Haley

Innocence

Middle row

Physical damage

Elves

DPS Tier 3 Yearning: Tier 2

Non Grata

At a set chance, whips the enemy 3 times, dealing AoE Physical Damage and applying Stinging.
If the target is affected by Stinging, Scorch, or Poison, additional Damage is dealt based on the number of active Status Effects.
Stinging: Reduces Recovery Amount and applies damage every second.
■ Total Physical Damage: 316.8%
■ Stinging Duration: 5s

Plan B

32 sec Cooldown

Launches a smoke bomb, dealing continuous AoE Physical Damage and applying Blindfold.
Blindfold: Normal Attacks miss.
■ Physical Damage Per Second: 58%
■ Physical Damage Duration: 7s
■ Blindfold Duration: 10s

Launches a smoke bomb, dealing continuous AoE Physical Damage and applying Blindfold.
Blindfold: Normal Attacks miss.
■ Physical Damage Per Second: 63.8%
■ Physical Damage Duration: 7s
■ Blindfold Duration: 10s

Launches a smoke bomb, dealing continuous AoE Physical Damage and applying Blindfold.
Blindfold: Normal Attacks miss.
■ Physical Damage Per Second: 69.6%
■ Physical Damage Duration: 7s
■ Blindfold Duration: 10s

Launches a smoke bomb, dealing continuous AoE Physical Damage and applying Blindfold.
Blindfold: Normal Attacks miss.
■ Physical Damage Per Second: 75.4%
■ Physical Damage Duration: 7s
■ Blindfold Duration: 10s

Launches a smoke bomb, dealing continuous AoE Physical Damage and applying Blindfold.
Blindfold: Normal Attacks miss.
■ Physical Damage Per Second: 81.2%
■ Physical Damage Duration: 7s
■ Blindfold Duration: 10s

Launches a smoke bomb, dealing continuous AoE Physical Damage and applying Blindfold.
Blindfold: Normal Attacks miss.
■ Physical Damage Per Second: 87%
■ Physical Damage Duration: 7s
■ Blindfold Duration: 10s

Launches a smoke bomb, dealing continuous AoE Physical Damage and applying Blindfold.
Blindfold: Normal Attacks miss.
■ Physical Damage Per Second: 92.8%
■ Physical Damage Duration: 7s
■ Blindfold Duration: 10s

Launches a smoke bomb, dealing continuous AoE Physical Damage and applying Blindfold.
Blindfold: Normal Attacks miss.
■ Physical Damage Per Second: 98.6%
■ Physical Damage Duration: 7s
■ Blindfold Duration: 10s

Launches a smoke bomb, dealing continuous AoE Physical Damage and applying Blindfold.
Blindfold: Normal Attacks miss.
■ Physical Damage Per Second: 104.4%
■ Physical Damage Duration: 7s
■ Blindfold Duration: 10s

Launches a smoke bomb, dealing continuous AoE Physical Damage and applying Blindfold.
Blindfold: Normal Attacks miss.
■ Physical Damage Per Second: 110.2%
■ Physical Damage Duration: 7s
■ Blindfold Duration: 10s

Launches a smoke bomb, dealing continuous AoE Physical Damage and applying Blindfold.
Blindfold: Normal Attacks miss.
■ Physical Damage Per Second: 116%
■ Physical Damage Duration: 7s
■ Blindfold Duration: 10s

Launches a smoke bomb, dealing continuous AoE Physical Damage and applying Blindfold.
Blindfold: Normal Attacks miss.
■ Physical Damage Per Second: 121.8%
■ Physical Damage Duration: 7s
■ Blindfold Duration: 10s

Launches a smoke bomb, dealing continuous AoE Physical Damage and applying Blindfold.
Blindfold: Normal Attacks miss.
■ Physical Damage Per Second: 127.6%
■ Physical Damage Duration: 7s
■ Blindfold Duration: 10s

Launches a smoke bomb, dealing continuous AoE Physical Damage and applying Blindfold.
Blindfold: Normal Attacks miss.
■ Physical Damage Per Second: 133.4%
■ Physical Damage Duration: 7s
■ Blindfold Duration: 10s

Launches a smoke bomb, dealing continuous AoE Physical Damage and applying Blindfold.
Blindfold: Normal Attacks miss.
■ Physical Damage Per Second: 139.2%
■ Physical Damage Duration: 7s
■ Blindfold Duration: 10s

Passive

If the target is affected by Stinging, Scorch, or Poison, additional Damage is dealt based on the number of active Status Effects.
■ Damage Increase: 20%

If the target is affected by Stinging, Scorch, or Poison, additional Damage is dealt based on the number of active Status Effects.
■ Damage Increase: 23%

If the target is affected by Stinging, Scorch, or Poison, additional Damage is dealt based on the number of active Status Effects.
■ Damage Increase: 26%

If the target is affected by Stinging, Scorch, or Poison, additional Damage is dealt based on the number of active Status Effects.
■ Damage Increase: 29%

If the target is affected by Stinging, Scorch, or Poison, additional Damage is dealt based on the number of active Status Effects.
■ Damage Increase: 32%

If the target is affected by Stinging, Scorch, or Poison, additional Damage is dealt based on the number of active Status Effects.
■ Damage Increase: 35%

If the target is affected by Stinging, Scorch, or Poison, additional Damage is dealt based on the number of active Status Effects.
■ Damage Increase: 38%

If the target is affected by Stinging, Scorch, or Poison, additional Damage is dealt based on the number of active Status Effects.
■ Damage Increase: 41%

If the target is affected by Stinging, Scorch, or Poison, additional Damage is dealt based on the number of active Status Effects.
■ Damage Increase: 44%

If the target is affected by Stinging, Scorch, or Poison, additional Damage is dealt based on the number of active Status Effects.
■ Damage Increase: 47%

If the target is affected by Stinging, Scorch, or Poison, additional Damage is dealt based on the number of active Status Effects.
■ Damage Increase: 50%

If the target is affected by Stinging, Scorch, or Poison, additional Damage is dealt based on the number of active Status Effects.
■ Damage Increase: 53%

If the target is affected by Stinging, Scorch, or Poison, additional Damage is dealt based on the number of active Status Effects.
■ Damage Increase: 56%

If the target is affected by Stinging, Scorch, or Poison, additional Damage is dealt based on the number of active Status Effects.
■ Damage Increase: 59%

If the target is affected by Stinging, Scorch, or Poison, additional Damage is dealt based on the number of active Status Effects.
■ Damage Increase: 62%

Normal ATK

Basic:
Whips enemies, dealing AoE Physical Damage.
■ Physical DMG: 85%
Enhance:
Every fourth attack reinforces the whip, increasing Physical ATK and Magical DEF for a set period of time.
■ Physical ATK Increase: 20%
■ Physical ATK Increase Duration: 6s
■ Magical DEF Increase: 40%
■ Magical DEF Increase Duration: 6s

Yearning (aside)

Space Warship Haley

Increases the bearer's Max HP, Physical ATK, CRIT Hit, and CRIT DMG.

Toward Earth

When acquiring an Enhanced Attack Buff, increases ATK and DEF of all Middle Row allied Apostles except self.
The final hit of the Freshman Skill always applies Stinging.
When Senior Skill is used, summons a battleship. The battleship drops 6 cannon shells on enemies in front, dealing AoE Physical Damage.
Stinging: Reduces Recovery and applies Damage every second.

Ally Base Protection Operation

Reduces the Incoming Damage of all allies.

Skill priority

You will level up most skills regardless how useful they are for the combat power padding in endgame. As a general rule of thumb:

Units you are not sure you will use long term: Skills to level 4. If they're passives that benefit the team, can take that to 10.
Strong units but not your main personality: Skills to level 10 for raids and elemental content. Not worth going higher if they are not your main team.
Strong units on your main personality (and waifus): Max out skills. You can start with 10/10/10 and slowly work towards 12/12/12 when you can sweep higher stages.
What about Yearnings? They unlock skills up to level 15. SUPER EXPENSIVE, only worth for your main team or really meta characters.

Recommended artifacts

Artifacts and runes will always change depending on the stage and content you are currently facing, this is just a couple of examples on what items work for this Apostle.

Legendary