Chloe

Madness

Front row

Magic damage

Sprites

Tank

Merry-go-round

Mounts Sebastian and activates Doll's Will for a set period of time, casting a Shield on herself. Increases Normal Attack Damage for every Basic Attack for a set period of time. The Normal Attack Damage Boost stacks up to 9 times. Doll's Will can't be disabled.
Doll's Will: The effect of Basic Attacks changes.
■ Doll's Will duration: 12.4s
■ Shield: 84% of Max HP
■ Shield Duration: 6s
■ Normal ATK DMG Increase: 7%
■ Normal ATK DMG Increase Duration: 10s

Le Petit Sebastian

50 sec Cooldown

Summon 7 Le Petit Sebastians. Le Petit Sebastians bump into enemies and explode, dealing AoE Magical Damage and applying Knockback.
Knockback: Is pushed back, becoming unable to act.
■ Magical DMG Per Le Petit Sebastian: 336%

Passive

Reduces Incoming Damage from Normal Attacks.
■ Incoming Normal ATK DMG reduction: 46%

Normal ATK

Swings Sebastian's arms, dealing Magical Damage to the enemy.
The effect of Doll's Will changes when activated.
When activating Doll's Will, flails Sebastian's arms around, dealing Magical Damage 3 times to the enemy. The final hit deals greater AoE Magical Damage.
Doll's Will: The effect of Basic Attacks changes.
■ Magical DMG: 125%
■ Doll's Will Magical DMG: 192%
■ Doll's Will Final Hit Magical DMG: 288%
Enhance:
Every third attack, strikes down with both her arms and Taunts enemies, dealing AoE Magical Damage and applying Knockback. While Doll's Will is activated, Enhanced Attack wont be used.
Taunt: Provokes attacks on the taunt.
Knockback: Is pushed back, becoming unable to act.
■ Magical DMG: 300%
■ Taunt Duration: 2s

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 7.
Strong units but not your main personality: Skills to level 7 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 7/7/7 and slowly work towards 12/12/12 when you can sweep stage 10.

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