Picora

Composed

Back row

Magic damage

Witches

Support Tier 2

Limited-Edition Sticker

Adds stickers to recover HP of 3 allies with the lowest HP Ratio for a set period of time. The stickers recover additional HP of allies, and increase Critical Hit Resistance and Physical Defense.
This effect can not be removed.
■ HP Recovery: 1260% of ATK
■ Sticker HP Recovery: 23% of Max HP
■ CRIT Resistance Increase: 22%
■ Physical DEF Increase: 22%
■ Sticker Duration: 8s

You Can Be a Fashionista Too

32 sec Cooldown

Removes all Status Effect from the ally with the highest Max HP and Adorns them. Increases the adorned ally's Max HP and Taunts the enemy for a set period of time. When adorn ends, restores HP equal to the increased Max HP amount.
This effect cannot be removed.
Taunt: Provokes attacks on the taunt.
■ Taunt Cast Interval: 3s
■ Taunt Duration: 2s
■ Max HP Increase: 47%
■ Max HP Increase Duration: 8s

Passive

Increases all allies CRIT Resistance.
(This effect activates even if Picora is not on the field).
■ CRIT Resistance Increase: 21%

Normal ATK

Casts a spell and deals Magical Damage to the closest single target
■ Magical DMG: 60%
Enhance:
At a set chance, flings two spells and deals Magical Damage to random targets.
■ Total Magical DMG: 120%

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