Ui

Vivacious

Middle row

Magic damage

Elementals

Support

Croaking Rain

Makes Croaking Rain fall on the surroundings, recovering allies HP and SP, and AoE Magical Damage to enemies every second. Recovery and Damage are applied to up to 9 allies and enemies each.
■ Continuous HP Recovery: 6.3% of Max HP
■ Continuous SP Recovery: 2.1% of target's Max SP
■ Total Magical DMG: 526%
■ Croaking Rain Duration: 6s

As I Said!

20 sec Cooldown

Croakie sings to grant the following effects to 3 different allies:
Fully restores HP and grants a Shield to the ally with the lowest remaining HP Ratio
Fully recovers SP of the ally with the lowest SP Ratio.
Inflicts mutate on a random enemy.
Mutate: Turns into a inanimate object and becomes unable to act.
■ Shield: 16% of max HP
■ Shield Duration: 6s
■ Mutate Duration: 5.2s

Passive

Reduces all allies Incoming Damage from Skill Attacks.
■ Incoming Skill ATK DMG Reduction: 23%

Normal ATK

Casts Elemental Magic, dealing Magical Damage to the enemy
■ Magical DMG: 100%
Enhance:
At a set chance, croakie lashes her tongue out at the enemy,dealing Magical Damage to them and recovering SP for nearby allies.
■ magical DMG: 160%
■ SP Recovery: 20

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