Sunday Speed Guide: 134 vs 160 SPD Breakpoints Explained

Understanding Speed Mechanics and Action Value

Speed tuning separates average Sunday builds from optimized hypercarry engines. The Action Value system governs turn order using AV = 10000 / SPD. Sunday's base 96 SPD at Level 80 requires substantial investment to reach performance breakpoints.

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Action Value System and Turn Order

When a character's AV reaches zero, they act, then AV resets based on current SPD. Lower AV = faster actions. A character with 74.07 AV (134 SPD) acts before 83.33 AV (120 SPD).

Enemy speed uses 1.32x multiplier for Level 86+ opponents. Enemies at 120 base SPD become 158 effective SPD (63.29 AV)—outpacing poorly tuned supports.

Memory of Chaos allocates 150 AV for opening cycle, then 100 AV per subsequent cycle. Specific SPD thresholds unlock additional actions within these windows.

Speed's Impact on Action Frequency

120 SPD baseline: 3 actions across first two cycles (83.33 AV per turn)

134 SPD threshold: 2 bonus turns within 5 cycles in cycles 1 and 4 (74.07 AV per action)

160 SPD threshold: 3 bonus turns across 5 cycles in cycles 1, 2, and 4—4 total actions in first two cycles (62.5 AV per turn)

Why Breakpoints Matter for Supports

Sunday's kit revolves around timed buffs:

• Skill: 100% action advance, 30% DMG boost (50% for summons), 2-turn duration
• Talent: 20% CRIT Rate, 3-turn duration
• Ultimate: 20% max Energy, Beatified CRIT DMG (30% of Sunday's CRIT DMG + 12%), 3-turn duration

More Sunday turns = more Skill advances, more Ultimates, better buff uptime. Hypercarries like Jing Yuan, DHIL, and Aglaea concentrate damage into burst windows—Sunday's speed ensures buffs align consistently.

Sunday's Hypercarry Role

Sunday is a 5-star Imaginary Harmony support for single-target hypercarry strategies, combining action manipulation, CRIT amplification, and energy restoration.

Key Mechanics:

• Skill's 100% advance grants DPS extra turns
• Ultimate restores 20% Energy while applying Beatified
• Talent's 20% CRIT Rate lasts 3 turns
• Battle start grants +25 Energy

Build Sunday with 200%+ CRIT DMG to maximize Beatified transfer. Energy Regeneration Rope enables 2-3 turn Ultimate cycles.

Top Synergies

Sunday + Mydei: -1 tuning (Sunday 134, Mydei 135). Add Tribbie + Gallagher/Luocha.

Sunday + Aglaea: Aglaea needs 2× Sunday's SPD during Ultimate. Sunday at 134+ lets Aglaea hit 268+ SPD. Pair with Robin + Huohuo.

Sunday + Jing Yuan/DHIL/Seele: Jing Yuan's Lightning-Lord gets 50% DMG boost as summon. DHIL's SP-hungry rotation pairs with Sunday's SP-positive kit. Seele's speed-scaling synergizes with action advance.

Skill Point Economy

Sunday's Skill costs 1 SP, Basic generates 1 SP. Optimal play alternates based on DPS needs.

E2 recovers 2 SP post-Ultimate while adding 30% Beatified DMG—enables sustained Skill spam but remains luxury investment.

Energy Regen Rope is non-negotiable for consistent Ultimate uptime.

The 134 Speed Breakpoint

134 SPD generates 74.07 AV per action, unlocking 2 bonus turns within 5 cycles (cycles 1 and 4).

Requires SPD boots (+25) plus 13 SPD from substats. With Sacerdos 6% SPD (~6 SPD), need only 7 SPD from substat rolls.

Action Value Calculation

AV = 10000 / 134 = 74.07

• First cycle (150 AV): 2 actions (148.14 AV consumed)
• Standard cycle (100 AV): 1.35 actions
• 5 cycles (550 total AV): 7.42 actions vs 6.60 at 120 SPD
• Gain: 2 bonus turns

Cycle-by-Cycle Performance

Cycle 1 (150 AV): 2 actions
Cycle 2 (100 AV): 1 action
Cycle 3 (100 AV): 1 action
Cycle 4 (100 AV): 2 actions
Cycle 5 (100 AV): 1 action

Total: 7 actions with critical double-action windows in opening and mid-fight.

Relic Requirements

Main Stats:

• Body: CRIT DMG
• Feet: SPD (+25)
• Sphere: HP%/DEF%
• Rope: Energy Regen Rate

Sets:

• 4pc Sacerdos' Relived Ordeal
• Broken Keel Ornament (requires 30% Effect RES)

Substats:

• 7 SPD from substats (2-3 rolls)
• CRIT DMG priority (target 200%+)
• 30%+ Effect RES
• HP% for survivability

Achievable within 2-3 weeks of focused farming.

Combat Performance

Memory of Chaos rotation:

Cycle 1: Skill on DPS → DPS acts → Ultimate on DPS
Cycles 2-3: Maintain buff uptime, Basic for SP
Cycle 4: Re-establish full buff stack

Maintains 80%+ buff uptime while preserving SP economy.

The 160 Speed Breakpoint

160 SPD generates 62.5 AV per action, unlocking 3 bonus turns across 5 cycles (cycles 1, 2, 4) with 4 actions in first two cycles.

Requires SPD boots (+25) plus 39 SPD from other sources. With Sacerdos 6% (~6 SPD), need 33 SPD from substats—approximately 10-11 successful rolls.

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Additional Action Windows

AV = 10000 / 160 = 62.5

Cycle 1 (150 AV): 2 actions
Cycle 2 (100 AV): 2 actions
First 2 cycles: 4 actions vs 3 at 134 SPD

Enables earlier Ultimate, immediate cycle 2 buff refresh, higher total Ultimate casts.

Mathematical Advantage

5 cycles (550 AV):

• 160 SPD: 8.8 actions
• 134 SPD: 7.42 actions
• Gain: 1.38 actions = 1 additional rotation

Translates to:

• 1 additional Skill cast
• Potentially 1 additional Ultimate
• 15-20% higher buff uptime in extended fights

Investment Cost

Substat Requirements:

• 33 SPD from substats
• 11-12 successful SPD rolls
• Average 2 SPD rolls per piece

Opportunity Cost:

• Each SPD roll replaces CRIT DMG roll (~6% each)
• 11 SPD rolls = ~65% CRIT DMG sacrificed
• Effective DPS loss: ~19.5% CRIT DMG on hypercarry

Justifies only in 6+ cycle encounters or wave content.

Multi-Wave Performance

Pure Fiction and wave-based Memory of Chaos:

Wave 1: 4 actions in first 2 cycles
Wave 2: Faster Ultimate cycling
Wave 3: 2-3 turn lead over 134 SPD

10-15 total cycles: 3-4 additional actions vs 134 SPD.

134 vs 160: Direct Comparison

134 SPD Advantages:

• Lower investment (7 vs 33 SPD from substats)
• Higher CRIT DMG (200%+ vs 150-180%)
• Stronger Beatified transfer
• Sufficient for 3-5 cycle clears
• F2P achievable

160 SPD Advantages:

• 1.38 additional actions per 5 cycles
• 4 actions in first 2 cycles
• Earlier Ultimate availability
• Better 6+ cycle performance
• Superior wave content scaling

Buff Uptime Differences

134 SPD: 75-85% uptime (7 actions)
160 SPD: 85-95% uptime (8-9 actions)

10-15% uptime improvement = 8-12% DPS increase, assuming buffs represent 80% of damage amplification. However, CRIT DMG sacrifice reduces this gain.

DPS Impact Testing

Jing Yuan hypercarry (Sunday + Jing Yuan + Robin + Huohuo):

134 SPD Sunday (220% CRIT DMG):

• Beatified: 78% CRIT DMG to Jing Yuan
• 7 Lightning-Lord advances
• Damage index: 100

160 SPD Sunday (155% CRIT DMG):

• Beatified: 58.5% CRIT DMG to Jing Yuan
• 8-9 Lightning-Lord advances
• Damage index: 98-102

Near-parity, with 160 SPD ahead only in 6+ cycle encounters.

Enemy Speed Variations

Level 86+ enemies: 1.32x multiplier

• 120 base → 158 effective (63.29 AV)
• 140 base → 185 effective (54.05 AV)

134 SPD (74.07 AV): Acts after 158 effective enemies
160 SPD (62.5 AV): Outpaces 158 effective enemies

160 SPD provides more consistent turn order control.

ROI Analysis

134 SPD: 2,000-3,000 stamina, 2-3 weeks farming
160 SPD: 6,000-10,000 stamina, 6-10 weeks farming

3-4x stamina investment yields 10-15% performance gain in optimal scenarios—negative ROI for most players.

Optimal Relic Builds

Both builds use:

• 4pc Sacerdos' Relived Ordeal: 6% SPD, 18% CRIT DMG to buffed targets
• Broken Keel Ornament: 10% team CRIT DMG at 30% Effect RES

134 Speed Build

Main Stats: CRIT DMG Body, SPD Feet, HP% Sphere, Energy Regen Rope

Substat Priority:

1. CRIT DMG (200%+ total)
2. SPD (7 from substats)
3. Effect RES (30%+)
4. HP%

Strategy: 2-3 SPD rolls, remaining 15-18 rolls to CRIT DMG. Achieves 200-220% CRIT DMG.

160 Speed Build

Main Stats: Identical to 134

Substat Priority:

1. SPD (33 from substats)
2. CRIT DMG (150-180% total)
3. Effect RES (30%+)
4. HP%

Strategy: 10-12 SPD rolls, remaining 8-10 to CRIT DMG. Sacrifices 40-70% CRIT DMG vs 134 build.

Speed Boots vs Energy Rope

SPD boots (+25) mandatory for both breakpoints—no alternative.

Energy Regen Rope (~19.4%) enables 2-3 turn Ultimate cycles vs 3-4 without. No viable alternative.

Substat Probability

134 SPD (7 SPD needed):

• 3 pieces with SPD rolling once
• Moderate difficulty, 40-60 farmed pieces

160 SPD (33 SPD needed):

• All 6 pieces with SPD rolling 2-3 times
• Probability per piece: 1.56% for double SPD roll
• Extremely low, requires 120-180+ pieces

Team-Specific Tuning

Sunday + Jing Yuan

Configuration:

• Jing Yuan: 135-140 SPD
• Sunday: 134 SPD (-1 tuning)
• Robin: 136-141 SPD
• Sustain: 120-125 SPD

Lightning-Lord receives 50% DMG buff as summon. 134 SPD pairs perfectly with standard Jing Yuan builds.

Sunday + DHIL

Configuration:

• DHIL: 135-140 SPD
• Sunday: 134 SPD
• Sparkle/Tingyun: 140-145 SPD (SP generation)
• Sustain: 120-125 SPD

134 SPD suffices—160 creates turn order complications. E2 Sunday recovers 2 SP post-Ultimate, elevating him to top-tier DHIL support.

Enemy Composition Adjustments

Fast enemies (140+ base, 185+ effective): Consider 160 SPD for turn priority
Slow enemies (100-120 base, 132-158 effective): 134 SPD maintains advantage
Mixed compositions: Default to 134 SPD for efficiency

Endgame Considerations

Memory of Chaos Floor 12

Demands 3-5 cycle clears.

134 SPD: Sufficient for 3-4 cycle clears, comfortable star achievement
160 SPD: Marginal improvement, rarely changes star thresholds

Recommendation: 134 SPD suffices unless consistently failing 4-5 cycle thresholds.

Apocalyptic Shadow

Single-boss, 6-8 cycle encounters.

8 cycles (850 AV):

• 134 SPD: 11.47 actions
• 160 SPD: 13.6 actions
• Gain: 2.13 actions = 15-20% DPS increase

Strongest case for 160 SPD investment.

Pure Fiction

10-15 cycles across waves.

1,300 AV:

• 134 SPD: 17.5 actions
• 160 SPD: 20.8 actions
• Gain: 3.3 actions

160 SPD performs better, but Sunday suboptimal for AoE-focused mode.

Eidolon Impact

E2: 2 SP recovery, +30% Beatified DMG. Enables aggressive Skill spam at any speed.

E6: CRIT Rate stacking competes with SPD substats. E6 owners default to 134 SPD, invest in CRIT Rate instead.

Signature LC: Energy efficiency improves but doesn't change breakpoint requirements.

Common Mistakes

Over-Investing in Speed

Mistake: 170+ SPD with <120% CRIT DMG

Why it fails: Beatified at 120% CRIT DMG grants 48% vs 72% at 200% CRIT DMG—24% permanent loss rarely compensated by 2 extra actions.

Fix: Stop at 134 or 160. Never exceed 160 unless already 180%+ CRIT DMG.

Ignoring Enemy AV

Mistake: Matching Sunday and DPS speed exactly (both 135 SPD)

Why it fails: Equal speed creates random turn order due to AV tie-breaking.

Fix: Maintain strict -1 tuning (Sunday 134, DPS 135).

Misunderstanding Buff Duration

Mistake: Assuming faster Sunday extends buff duration

Why it fails: Duration measures in target turns, not AV. 2-turn buff = 2 DPS actions regardless of Sunday's speed.

Fix: Focus on minimizing buff gaps, not extending duration.

When Lower Speed Wins

Scenario: 160 SPD Sunday with 100 SPD DHIL

Why it fails: Action advance on slow DPS often occurs when natural turn arrives soon—wasting advance value while sacrificing CRIT DMG.

Fix: Match Sunday's speed to DPS tier. Fast DPS (140+) benefit from 160. Slow DPS (100-120) benefit from 134 with higher CRIT DMG.

Resource Optimization

Stamina-Efficient Farming

Priority: Sacerdos domain (40 stamina/run)

Strategy:

• Week 1-2: Complete 4pc set (any substats)
• Week 3-4: Replace worst 2 pieces
• Week 5+: Incremental upgrades

Allocation:

• 60% Sacerdos
• 20% Broken Keel
• 20% Trace materials

Achieves functional 134 SPD in 3-4 weeks.

Trace Priority

1. Skill (max): Core functionality
2. Ultimate (8-9): Functional Beatified
3. Talent (6-8): Diminishing returns beyond
4. Basic (1-4): Minimal investment

When to Stop Rolling

134 SPD threshold:

• 134 SPD achieved
• 180%+ CRIT DMG
• 30%+ Effect RES
• 3,000+ HP

160 SPD threshold:

• 160 SPD achieved
• 150%+ CRIT DMG
• 30%+ Effect RES
• Functional HP

Continuing beyond enters diminishing returns. Complete Sunday at 134, then build other characters for better account-wide value.

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FAQ

What is the 134 speed breakpoint for Sunday?

134 SPD grants 2 bonus turns in 5 cycles (cycles 1 and 4), generating 74.07 AV per action. Requires SPD boots (+25) plus 7 SPD from substats with Sacerdos 6% bonus. Achievable in 2-3 weeks, balances action frequency with 200%+ CRIT DMG for strong Beatified transfers.

Is 160 speed worth it for Sunday?

160 SPD provides 3 bonus turns in 5 cycles and 4 actions in first 2 cycles—1.38 additional actions vs 134. Requires 33 SPD from substats, sacrificing 40-70% CRIT DMG. Justifies only in 6+ cycle encounters (Apocalyptic Shadow, extended MoC) where action frequency compensates for weaker buffs. For most content, 134 SPD offers better efficiency.

How does speed affect buff uptime?

Speed determines reapplication frequency, not duration. Buffs last fixed target turns. 134 SPD (7 actions/5 cycles) maintains 75-85% uptime. 160 SPD (8-9 actions) increases to 85-95%. Improvement translates to 8-12% DPS increase, assuming buffs represent 80% of damage amplification.

What relics help reach 134 speed?

4pc Sacerdos provides 6% SPD (~6 SPD at base 96), reducing requirements to 7 SPD from substats. With SPD boots (+25), need only 2-3 successful rolls across 6 pieces. Broken Keel ornament adds 10% team CRIT DMG at 30% Effect RES threshold.

Should I sacrifice crit for speed?

Only up to 134 SPD. Beatified transfers 30% of Sunday's CRIT DMG—sacrificing beyond 134 often reduces team damage. At 134, maintain 200%+ CRIT DMG (72% transferred). At 160, drops to 150-180% (57-66% transferred), a 15% loss compensating only in 6+ cycle encounters.

How does enemy speed affect tuning?

Level 86+ enemies use 1.32x multiplier, creating 158-185 effective SPD for typical 120-140 base enemies. Sunday at 134 (74.07 AV) sometimes acts after these enemies. 160 (62.5 AV) more consistently maintains turn priority. Against fast enemies (140+ base), 160 provides better control. Against slow (100-120 base), 134 suffices while preserving CRIT DMG.