Sunday's Energy Mechanics and Ultimate Cost
Sunday's Ultimate costs 130 energy. His kit compensates through multiple sources: 25 energy at battle start, guaranteed 40 post-Ultimate, and traces providing 8-30 additional energy. This framework forms rotation planning foundation.
ERR functions as multiplicative modifier on all energy from attacks, skills, and hits. At 100% baseline, Sunday receives standard values. Each point above 100% proportionally increases intake—119% ERR = 19% more energy per cycle. For optimization through premium resources, cheap hsr top up at BitTopup provides cost-effective pulls for signature Light Cone and Eidolons.
Critical calculation: reach 130 energy within three actions. Sunday's Skill advances allies 100% while recovering 1 SP on Beatified targets, creating SP-neutral rotations. Talent grants 20% CRIT Rate to Skill targets for 3 turns, Ultimate provides 20% Max Energy (minimum 40) plus Beatified buff (+30% CRIT DMG to target, +12% to Sunday for 3 turns).
Base Energy Generation
Sunday generates energy through four channels. Basic attacks provide minimal energy (~20 per use), inefficient for optimization. Skill contributes standard energy enhanced by ERR multipliers while advancing allies and buffing damage (+30% DMG, +50% extra for summons over 2 turns).
Traces significantly boost income: Gleaming Admonition adds 20, Benison of Paper and Rites contributes 30, Sculpture's Preamble provides 8, Exalted Sweep regenerates 25. Combined with Rest Day's Longing regenerating to 40, these passives accumulate 93-123 energy before ERR multipliers or combat energy.
40 post-Ultimate energy creates sustainable baseline. Standard 3-turn rotation: Turn 1 Skill (25 start + traces), Turn 2 Skill (accumulating combat energy), Turn 3 Ultimate (hitting 130). Requires precise ERR tuning for enemy hit variance and team composition dynamics.
How ERR Multiplies Energy Gain
ERR operates multiplicatively on every energy instance. 119.44% ERR gains 19.44% additional energy from all sources—basics, skills, hits, ally abilities. Multiplier applies before caps, universally valuable for Ultimate frequency.
Target 119-124% ERR emerges from Memory of Chaos testing. At 119.44% (Rope + 5% planar), Sunday consistently reaches 130 energy in three actions at 134 SPD executing Skill-Skill-Ultimate. 124.44% provides safety margin for suboptimal rotations or SP constraints forcing basics.
Diminishing returns beyond 130% ERR. Kit's guaranteed 40 post-Ultimate plus abundant traces mean excessive ERR sacrifices critical stats (CRIT DMG, SPD, Effect RES) without proportional improvement. Mathematical ceiling exists—additional ERR can't reduce 3-turn to 2-turn due to action economy limits.
Penacony Set Deep Dive
Penacony provides 5% ERR (2pc) plus 10% DMG for same-type allies. Directly addresses 119-124% target with ERR Rope. Accessible and straightforward for supports prioritizing Ultimate uptime.
Usage stats reveal surprises: Penacony sees only 14% adoption vs Lushaka's 80% (7.51 avg MoC cycles). Disparity stems from Lushaka's superior effect: +12% ATK for first non-lead character, typically benefiting primary DPS. Broken Keel claims 14.32% usage, matching Penacony through +10% team CRIT DMG at 30%+ Effect RES.
5% ERR translates to ~6.5 additional energy per rotation (5% of 130). This marginal gain rarely determines rotation success when proper Rope and trace management exist. Players achieve identical 3-turn consistency using Lushaka/Broken Keel by optimizing substats and Light Cone instead.
Mathematical Impact of 5% ERR
Calculating Penacony's value requires examining complete energy income. Starting 25 battle energy, adding traces (93-123), post-Ultimate 40, and combat energy from 2-3 Skills plus hits (~40-60 per cycle) = roughly 198-248 base energy across three turns before ERR multiplication.
At 100% baseline, yields 198-248 energy—far exceeding 130 cost. Real scenarios introduce variance: SP shortages forcing basics, enemy phases preventing hits, team compositions generating fewer interactions.
Applying 119.44% ERR to conservative 180 base estimate yields 215 effective energy—comfortably exceeding 130 with 85 buffer. Removing Penacony's 5% (114.44% ERR) produces 206 effective, maintaining 76 buffer. This 9-energy difference represents set's tangible contribution, insufficient to justify sacrificing Lushaka's ATK buff or Broken Keel's CRIT DMG in most teams.
Math confirms Penacony functions as safe option ensuring consistency regardless of substats, but optimized builds achieve identical results through superior planars paired with adequate ERR substats. For maximizing potential, buy oneiric shards global at BitTopup enables efficient farming with competitive pricing.
Alternative Sets Outperforming Penacony
Lushaka the Sunken Seas dominates (80% usage) providing identical 5% ERR plus 12% ATK to first non-lead. In hypercarry comps where Sunday supports primary DPS (Jing Yuan, Seele, Acheron), ATK bonus directly amplifies team damage. 12% ATK multiplies with CRIT and damage bonuses, creating exponential scaling outweighing Penacony's same-type DMG.
Broken Keel offers different path: +10% Effect RES and +10% team CRIT DMG at 30% Effect RES threshold. Benefits CRIT-stacking teams, especially with Sacerdos 4pc (+18% CRIT DMG per stack, 96% usage). Combined CRIT DMG from Keel, Sacerdos, and Ultimate (+30% to target) creates multiplicative increases exceeding Penacony's additive ERR.
Sprightly Vonwacq presents niche for hyperspeed builds (120+ SPD). 5% ERR matches Penacony while providing 40% action advance on battle entry at 120+ SPD. Accelerates first Ultimate, enabling Turn 1 buffs in specific comps. One-time activation limits sustained value vs Lushaka's persistent ATK or Keel's continuous CRIT DMG.
ERR Breakpoints for 3-Turn Ultimates
119.44% ERR represents minimum reliable breakpoint for 3-turn rotations with standard teams. Combines Rope (19.44%) with any 5% planar (Lushaka, Penacony, Vonwacq), creating sufficient multiplication to reach 130 energy in three actions.
MoC 12 testing shows 119.44% achieves 95%+ consistency when Sunday maintains 134 SPD (1 slower than DPS) executing Skill-Skill-Ultimate. Remaining 5% variance from extreme scenarios: enemy invulnerability, SP droughts forcing basics, negative SP generation disrupting rhythm.
124.44% ERR (adding 5% from substats) elevates consistency to 98%+, insuring against suboptimal play or challenging mechanics. Beyond 130%, improvements plateau—can't physically execute Ultimates faster than every three turns due to action economy, making additional ERR inefficient vs CRIT DMG, SPD, Effect RES optimization.
ERR Rope vs Alternative Stats
ERR Rope provides 19.44%, cornerstone of energy economy. Alternative Rope stats (ATK%, HP%, DEF%) offer negligible value—damage contribution minimal, survivability rarely determines success. ERR Rope choice non-negotiable for 3-turn builds.
Critical decision involves Rope quality and substats. Mediocre ERR Rope with poor substats (flat ATK/DEF/HP) still outperforms exceptional ATK% Rope in virtually all scenarios—Sunday's personal damage irrelevant in meta comps. Prioritize ERR Rope acquisition even with suboptimal substats, gradually farm improved versions with CRIT DMG, SPD, Effect RES.
Substat ERR rolls (3.89% per roll) supplement planar bonuses when pursuing 124%+ targets. Two ERR rolls (7.78%) + Rope (19.44%) + Lushaka (5%) = 132.22% ERR, exceeding thresholds while maintaining superior planar benefits. Optimizes rotation reliability and team damage.
Light Cone Energy Bonuses
A Grounded Ascent (S1) regenerates 8 energy on Hymn DMG, stacking 3x for 3 turns while providing +24% DMG and 1 SP recovery every 2 uses. 76.57% usage, directly contributes energy and reduces ERR requirements through flat bonus.
But the Battle Isn't Over (S1) offers +18% ERR, 1 SP recovery every 2 Ultimates, +50% DMG for 1 turn. 14.75% usage reflects value for players lacking signature—18% ERR significantly reduces relic pressure, potentially enabling 3-turn rotations with non-ERR Rope (not recommended).
Light Cone impact calculation: Battle S1 (18%) + Rope (19.44%) + Lushaka (5%) = 142.44% ERR, exceeding thresholds substantially. Overcapping allows flexibility in substats, redirecting priorities toward CRIT DMG (180-220% target) and SPD (134 baseline, 160+ hyperspeed) without sacrificing consistency.
Eidolon Impact
E1 Soloist's Warming Encore introduces 16% DEF ignore for targets, 40% additional summon damage over 2 turns. Lacks direct energy generation but amplifies support value. Teams dealing higher damage may tolerate 4-turn rotations for superior CRIT DMG stacking.
E2+ don't fundamentally alter energy mechanics or ERR requirements. 119-124% threshold remains consistent across all Eidolons for 3-turn consistency. Investment priority: E1 for damage, then redirect to relic farming and Light Cone vs chasing energy Eidolons.
Practical implication: Eidolons don't reduce Rope necessity or enable alternative planars for 3-turn rotations. E0 and E6 require identical ERR optimization, making energy planning universal across investment levels.
Team Synergy Impact
Sunday's energy operates semi-independently due to self-sufficient kit. Specific teammates introduce energy-sharing: Tingyun's Ultimate grants ally energy, accelerating first cycle. Huohuo's talent provides passive team regeneration, creating additional income beyond kit.
Hypercarry comps (Sunday + single DPS + sustain + flex) generate predictable patterns. Skill advances carry executing high-frequency attacks generating combat energy through hits. Consistent rhythm supports reliable 3-turn at 119.44%. Dual DPS introduces variance—energy distribution across multiple dealers may reduce Sunday's combat energy from fewer counterattacks.
SP economy dramatically impacts feasibility. SP-positive teams enable Skill-Skill-Ultimate without constraints. SP-negative forces basics, disrupting accumulation and potentially extending to 4 turns despite adequate ERR. Team building must account for SP rates when planning consistency.
Energy-Generating Teammates
Tingyun's Ultimate restores 50 energy to target, enabling Sunday's first Ultimate as early as Turn 2. Valuable in short encounters (Pure Fiction, Apocalyptic Shadow) where faster buffs improve clears. Doesn't reduce ERR requirements for sustained 3-turn across extended fights.
Huohuo provides passive regeneration through talent, distributing energy to all allies. Gradual accumulation supplements kit sources, creating minor buffer against disruptions. Adds ~10-15 energy per rotation, equivalent to 1-2% effective ERR—helpful but insufficient to replace proper stat optimization.
Yukong/Asta offer action advance and SPD buffs, indirectly affecting energy through increased action frequency. More actions = additional combat energy from hits and skills. Don't reduce 119.44% threshold—accelerate rotation speed without changing per-action requirements.
Skill Point Distribution
SP-neutral Sunday rotations (Skill on Beatified recovering 1 SP) require teammates generating surplus. Acheron, Kafka, Black Swan excel as SP-positive, enabling continuous Skills without depletion. Achieve consistent 3-turn at minimum ERR (119.44%) through uninterrupted execution.
SP-hungry carries (Seele, Jing Yuan, Qingque) create tension forcing basics. Each basic replaces Skill, reducing energy by ~20-30 depending on conditions. Requires higher ERR (124%+) or acceptance of occasional 4-turn cycles during SP-constrained phases.
Sustain SP generation impacts flexibility. Aventurine/Fu Xuan operate neutrally. Luocha/Lynx consume SP, exacerbating pressure in negative teams. Huohuo generates SP through skill, actively supporting Skill-Skill-Ultimate. Composition must balance total generation to enable optimal execution.
Build Recommendations and Penacony Verdict
Penacony's 5% ERR proves mathematically sufficient but strategically suboptimal for most builds. Enables 3-turn with Rope, functioning as safe choice prioritizing consistency. However, Lushaka's identical 5% + 12% ATK delivers superior team damage in 80% of meta comps, explaining dominant usage.
Broken Keel presents optimal alternative for CRIT teams. At 30% Effect RES (achievable through substats/Body), provides +10% team CRIT DMG. Combined with Sacerdos 4pc (+18% CRIT DMG per stack), amplifies CRIT scaling to extreme levels. Sacrifices 5% ERR but compensates through superior damage multiplication, maintaining 3-turn via optimized substats and Light Cone.
Verdict: Penacony viable for players lacking optimized Lushaka or Imaginary-heavy teams. For competitive optimization, prioritize Lushaka for hypercarry or Broken Keel for CRIT-stacking, achieving 119.44% through Rope + planar while maximizing team damage through superior secondary effects.
When Penacony Excels
Imaginary-focused teams where multiple characters benefit from 10% same-type DMG. Sunday + Imaginary DPS (Dr. Ratio, Welt, Yukong) + Imaginary sustain creates scenarios where Penacony's secondary provides team-wide value exceeding Lushaka's single-target ATK. Represents ~10-15% of team archetypes.
Early/mid-progression players benefit from accessibility and straightforward optimization. Unconditional 5% ERR enables 3-turn without perfect substats or premium Light Cones. Players lacking Grounded Ascent or Battle find guaranteed ERR valuable for baseline consistency while farming alternatives.
Content with extreme energy drain theoretically favors Penacony's ERR focus. Current MoC/PF/AS lack such mechanics, making this hypothetical. Future content introducing energy disruption could elevate strategic value, warranting retention after acquiring optimized Lushaka.
When Alternatives Outperform
Lushaka dominates 80% of applications through superior damage. Hypercarry with single primary DPS (Acheron, Jing Yuan, Seele, Jingliu) gain exponential value from 12% ATK to first non-lead. ATK multiplies with CRIT, damage bonuses, vulnerability, creating 8-15% team damage improvements vs Penacony's same-type DMG.
Broken Keel excels in CRIT-stacking with multiple CRIT-dependent dealers. +10% team CRIT DMG at 30% Effect RES synergizes with Sacerdos 4pc, Ultimate buff (+30% CRIT DMG), and carry-specific amplification. Teams featuring Seele, Qingque, Dr. Ratio achieve higher ceilings through Keel's multiplicative CRIT vs Penacony's additive ERR.
Sprightly Vonwacq serves hyperspeed (160+ SPD) prioritizing Turn 1 Ultimate. 40% action advance at 120+ SPD accelerates initial rotation, enabling immediate buff deployment. Valuable in short encounters (PF 4-cycle clears) where faster setup outweighs sustained optimization, though Lushaka typically maintains superiority in extended fights.
Resource Priority for New Players
Priority 1: ERR Rope acquisition—enables 3-turn regardless of other gear. Farm any available Rope initially, gradually pursue improved versions with CRIT DMG, SPD, Effect RES substats. Accept mediocre substats temporarily for functional baseline.
Priority 2: Lushaka for hypercarry or Broken Keel for CRIT comps. Penacony serves as placeholder while farming optimal alternatives—don't invest excessive resources perfecting Penacony if planning transition. Allocate resin toward sets with long-term viability.
Priority 3: Sacerdos 4pc (96% usage) provides 6% SPD (2pc) and 18% CRIT DMG stacks (4pc) for 2 turns on Skill/Ultimate. Overwhelming adoption reflects universal value across all archetypes. Farm alongside planars, accepting gradual optimization over months.
Light Cone:Grounded Ascent (76.57% usage) provides superior energy and damage, justifying premium allocation for competitive players. Battle offers budget alternative with 18% ERR, reducing relic pressure. F2P options like Dance! Dance! Dance! or Memories of the Past function adequately while accumulating resources.
Common ERR Optimization Mistakes
Over-investing beyond thresholds: Players pursue 140%+ ERR through excessive substats and Light Cone, sacrificing CRIT DMG (180-220% target) and SPD (134 baseline). Kit provides sufficient base generation that ERR beyond 124% yields negligible improvements while significantly reducing team damage through lost stat optimization.
Neglecting SP economy: Skill-Skill-Ultimate consumes 2 SP per cycle (recovering 1 on Beatified), requiring team SP generation. Building Sunday in SP-negative teams (multiple hungry carries, consuming sustains) forces basics disrupting accumulation, then incorrectly attributing failures to insufficient ERR vs SP management.
Misunderstanding action value: Sunday functions optimally at 134 SPD (1 slower than carry), enabling efficient turn order where Skills immediately before carry actions. Building hyperspeed (160+) without corresponding team SPD adjustments creates desynchronization where Sunday advances allies lacking sufficient energy or SP to capitalize on buffs.
Myth: More ERR = Better Performance
ERR exhibits clear diminishing returns beyond 124%. Mathematical ceiling exists—additional ERR can't reduce rotation length due to action economy. Sunday must execute three actions minimum to generate sufficient combat energy and allow team interactions. Pursuing 150%+ sacrifices critical offensive stats without enabling 2-turn rotations, creating net negative performance.
Opportunity cost: each ERR substat roll (3.89%) represents lost CRIT DMG (5.83%), SPD (2), or Effect RES (4%). At 119.44% baseline (Rope + planar), achieves 95%+ consistency. Investing 4 rolls to reach 135% improves to 99%, but those same 4 rolls to CRIT DMG (+23.32%) amplify team damage by 8-12% through Ultimate buff scaling.
Optimal approach balances ERR sufficiency with offensive maximization. Target 119-124% through Rope + planar + 0-2 substat rolls, redirect remaining priorities toward CRIT DMG, SPD, Effect RES. Achieves consistency while maximizing team damage potential.
Overlooking Team Composition Impact
Rotation consistency depends heavily on team SP generation and combat patterns. Players optimize Sunday in isolation, achieving 124% ERR and perfect distribution, then experience failures in SP-negative teams forcing basics. Comprehensive optimization requires simultaneous evaluation of stats and team resource economy.
Combat energy varies across archetypes. Hypercarry with single high-frequency attacker (Seele, Acheron) generates consistent counterattacks providing combat energy. Dual DPS distributes aggro, potentially reducing intake by 20-30% per cycle. Variance necessitates higher ERR (124%+) for dual DPS vs hypercarry (119.44% sufficient).
Sustain selection impacts effective generation through survivability and SP contribution. Aventurine enables aggressive play generating more hits (increased combat energy), while Luocha's SP consumption forces basics (reduced generation). Team building must account for interaction effects when establishing ERR requirements.
FAQ
Does Sunday need ERR Rope for 3-turn rotations? Yes, Rope's 19.44% forms non-negotiable foundation. Alternative stats provide negligible value for support role and can't be compensated through substats alone. Even with Battle Light Cone (18% ERR), Rope remains essential for 119-124% threshold ensuring 95%+ consistency.
Can Sunday achieve 3-turn without planar ERR bonus? Technically possible but impractical. Removing planar ERR requires compensating 5% through substats—~2 perfect rolls. Forces suboptimal allocation sacrificing CRIT DMG/SPD. Critically, necessitates non-ERR planars offering inferior support vs Lushaka's ATK or Keel's CRIT DMG, creating net negative performance despite hitting rotation targets.
How much does signature reduce ERR requirements?Grounded Ascent provides 8 flat energy per Hymn stack (up to 3), contributing ~15-24 per rotation. Translates to roughly 3-4% effective ERR reduction. Doesn't eliminate Rope necessity or enable alternative planars—provides safety margin allowing slightly lower substats (119% vs 124%) while maintaining consistency.
Is Penacony worth farming for Sunday? No for most. Lushaka provides identical 5% ERR plus 12% ATK to primary DPS, delivering superior team damage in 80% of comps. Farm Lushaka as primary target, using Penacony only as placeholder or niche for Imaginary-heavy teams. Prioritize Lushaka/Keel depending on archetype, Penacony as acceptable alternative when optimal sets unavailable.
What ERR percentage for endgame builds? Target 119-124% for optimal balance between consistency and offensive optimization. 119.44% (Rope + 5% planar) achieves 95%+ in standard teams with proper SP management. Increase to 124% through 1-2 ERR substats for safety in SP-negative or dual DPS comps. Avoid exceeding 130%—additional investment yields negligible improvements while sacrificing critical CRIT DMG and SPD.
Does E1 change ERR requirements? No, E1 provides 16% DEF ignore and 40% summon damage but lacks direct energy mechanics. Sunday requires identical 119-124% at E0 and E6 for consistent 3-turn rotations. Eidolons improve damage and support without altering fundamental energy economy or stat priorities. Focus E1 for damage scaling, redirect investment to relic farming vs pursuing energy Eidolons.
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