Yomi

Depressed

Middle row

Magic damage

Mystic

Support Tier 0

Skills

Freshman Skill

Moonflower

For a set period of time, creates a Moon Field at the location of the ally with the highest Max HP, and Basic Attack activations are replaced with Enhanced Attacks. Every second, increases the Defense of allies while reducing the Attack of enemies within the Moon Field.
■ Moon Field Activation Duration: 8s
■ Enhanced Attack Activation Duration: 8s
■ Ally DEF Increase: 20%
■ DEF Increase Duration: 6s
■ Enemy ATK Reduction: 30%
■ ATK Reduction Duration: 6s

For a set period of time, creates a Moon Field at the location of the ally with the highest Max HP, and Basic Attack activations are replaced with Enhanced Attacks. Every second, increases the Defense of allies while reducing the Attack of enemies within the Moon Field.
■ Moon Field Activation Duration: 8s
■ Enhanced Attack Activation Duration: 8s
■ Ally DEF Increase: 21%
■ DEF Increase Duration: 6s
■ Enemy ATK Reduction: 31%
■ ATK Reduction Duration: 6s

For a set period of time, creates a Moon Field at the location of the ally with the highest Max HP, and Basic Attack activations are replaced with Enhanced Attacks. Every second, increases the Defense of allies while reducing the Attack of enemies within the Moon Field.
■ Moon Field Activation Duration: 8s
■ Enhanced Attack Activation Duration: 8s
■ Ally DEF Increase: 22%
■ DEF Increase Duration: 6s
■ Enemy ATK Reduction: 32%
■ ATK Reduction Duration: 6s

For a set period of time, creates a Moon Field at the location of the ally with the highest Max HP, and Basic Attack activations are replaced with Enhanced Attacks. Every second, increases the Defense of allies while reducing the Attack of enemies within the Moon Field.
■ Moon Field Activation Duration: 8s
■ Enhanced Attack Activation Duration: 8s
■ Ally DEF Increase: 23%
■ DEF Increase Duration: 6s
■ Enemy ATK Reduction: 33%
■ ATK Reduction Duration: 6s

For a set period of time, creates a Moon Field at the location of the ally with the highest Max HP, and Basic Attack activations are replaced with Enhanced Attacks. Every second, increases the Defense of allies while reducing the Attack of enemies within the Moon Field.
■ Moon Field Activation Duration: 8s
■ Enhanced Attack Activation Duration: 8s
■ Ally DEF Increase: 24%
■ DEF Increase Duration: 6s
■ Enemy ATK Reduction: 34%
■ ATK Reduction Duration: 6s

For a set period of time, creates a Moon Field at the location of the ally with the highest Max HP, and Basic Attack activations are replaced with Enhanced Attacks. Every second, increases the Defense of allies while reducing the Attack of enemies within the Moon Field.
■ Moon Field Activation Duration: 8s
■ Enhanced Attack Activation Duration: 8s
■ Ally DEF Increase: 25%
■ DEF Increase Duration: 6s
■ Enemy ATK Reduction: 35%
■ ATK Reduction Duration: 6s

For a set period of time, creates a Moon Field at the location of the ally with the highest Max HP, and Basic Attack activations are replaced with Enhanced Attacks. Every second, increases the Defense of allies while reducing the Attack of enemies within the Moon Field.
■ Moon Field Activation Duration: 8s
■ Enhanced Attack Activation Duration: 8s
■ Ally DEF Increase: 26%
■ DEF Increase Duration: 6s
■ Enemy ATK Reduction: 36%
■ ATK Reduction Duration: 6s

For a set period of time, creates a Moon Field at the location of the ally with the highest Max HP, and Basic Attack activations are replaced with Enhanced Attacks. Every second, increases the Defense of allies while reducing the Attack of enemies within the Moon Field.
■ Moon Field Activation Duration: 8s
■ Enhanced Attack Activation Duration: 8s
■ Ally DEF Increase: 27%
■ DEF Increase Duration: 6s
■ Enemy ATK Reduction: 37%
■ ATK Reduction Duration: 6s

For a set period of time, creates a Moon Field at the location of the ally with the highest Max HP, and Basic Attack activations are replaced with Enhanced Attacks. Every second, increases the Defense of allies while reducing the Attack of enemies within the Moon Field.
■ Moon Field Activation Duration: 8s
■ Enhanced Attack Activation Duration: 8s
■ Ally DEF Increase: 28%
■ DEF Increase Duration: 6s
■ Enemy ATK Reduction: 38%
■ ATK Reduction Duration: 6s

For a set period of time, creates a Moon Field at the location of the ally with the highest Max HP, and Basic Attack activations are replaced with Enhanced Attacks. Every second, increases the Defense of allies while reducing the Attack of enemies within the Moon Field.
■ Moon Field Activation Duration: 8s
■ Enhanced Attack Activation Duration: 8s
■ Ally DEF Increase: 29%
■ DEF Increase Duration: 6s
■ Enemy ATK Reduction: 39%
■ ATK Reduction Duration: 6s

For a set period of time, creates a Moon Field at the location of the ally with the highest Max HP, and Basic Attack activations are replaced with Enhanced Attacks. Every second, increases the Defense of allies while reducing the Attack of enemies within the Moon Field.
■ Moon Field Activation Duration: 8s
■ Enhanced Attack Activation Duration: 8s
■ Ally DEF Increase: 30%
■ DEF Increase Duration: 6s
■ Enemy ATK Reduction: 40%
■ ATK Reduction Duration: 6s

For a set period of time, creates a Moon Field at the location of the ally with the highest Max HP, and Basic Attack activations are replaced with Enhanced Attacks. Every second, increases the Defense of allies while reducing the Attack of enemies within the Moon Field.
■ Moon Field Activation Duration: 8s
■ Enhanced Attack Activation Duration: 8s
■ Ally DEF Increase: 31%
■ DEF Increase Duration: 6s
■ Enemy ATK Reduction: 41%
■ ATK Reduction Duration: 6s

Senior Skill

Devoted Reception

26 sec Cooldown

Summons a moonlight walking on clouds for a set period of time. The moonlight slowly advances in the direction Yomi is facing. Allies within the moonlight recover SP every second. Deals Damage to Enemies every second and reduces their SP.
■ Ally SP Recovery: 10
■ Magical DMG per sec: 250%
■ Enemy SP Reduction: 15
■ Moonlight Duration: 12s

Summons a moonlight walking on clouds for a set period of time. The moonlight slowly advances in the direction Yomi is facing. Allies within the moonlight recover SP every second. Deals Damage to Enemies every second and reduces their SP.
■ Ally SP Recovery: 10
■ Magical DMG per sec: 270%
■ Enemy SP Reduction: 15
■ Moonlight Duration: 12s

Summons a moonlight walking on clouds for a set period of time. The moonlight slowly advances in the direction Yomi is facing. Allies within the moonlight recover SP every second. Deals Damage to Enemies every second and reduces their SP.
■ Ally SP Recovery: 11
■ Magical DMG per sec: 290%
■ Enemy SP Reduction: 16
■ Moonlight Duration: 12s

Summons a moonlight walking on clouds for a set period of time. The moonlight slowly advances in the direction Yomi is facing. Allies within the moonlight recover SP every second. Deals Damage to Enemies every second and reduces their SP.
■ Ally SP Recovery: 11
■ Magical DMG per sec: 310%
■ Enemy SP Reduction: 16
■ Moonlight Duration: 12s

Summons a moonlight walking on clouds for a set period of time. The moonlight slowly advances in the direction Yomi is facing. Allies within the moonlight recover SP every second. Deals Damage to Enemies every second and reduces their SP.
■ Ally SP Recovery: 12
■ Magical DMG per sec: 330%
■ Enemy SP Reduction: 17
■ Moonlight Duration: 12s

Summons a moonlight walking on clouds for a set period of time. The moonlight slowly advances in the direction Yomi is facing. Allies within the moonlight recover SP every second. Deals Damage to Enemies every second and reduces their SP.
■ Ally SP Recovery: 12
■ Magical DMG per sec: 350%
■ Enemy SP Reduction: 17
■ Moonlight Duration: 12s

Summons a moonlight walking on clouds for a set period of time. The moonlight slowly advances in the direction Yomi is facing. Allies within the moonlight recover SP every second. Deals Damage to Enemies every second and reduces their SP.
■ Ally SP Recovery: 13
■ Magical DMG per sec: 370%
■ Enemy SP Reduction: 18
■ Moonlight Duration: 12s

Summons a moonlight walking on clouds for a set period of time. The moonlight slowly advances in the direction Yomi is facing. Allies within the moonlight recover SP every second. Deals Damage to Enemies every second and reduces their SP.
■ Ally SP Recovery: 13
■ Magical DMG per sec: 390%
■ Enemy SP Reduction: 18
■ Moonlight Duration: 12s

Summons a moonlight walking on clouds for a set period of time. The moonlight slowly advances in the direction Yomi is facing. Allies within the moonlight recover SP every second. Deals Damage to Enemies every second and reduces their SP.
■ Ally SP Recovery: 14
■ Magical DMG per sec: 410%
■ Enemy SP Reduction: 19
■ Moonlight Duration: 12s

Summons a moonlight walking on clouds for a set period of time. The moonlight slowly advances in the direction Yomi is facing. Allies within the moonlight recover SP every second. Deals Damage to Enemies every second and reduces their SP.
■ Ally SP Recovery: 14
■ Magical DMG per sec: 430%
■ Enemy SP Reduction: 19
■ Moonlight Duration: 12s

Summons a moonlight walking on clouds for a set period of time. The moonlight slowly advances in the direction Yomi is facing. Allies within the moonlight recover SP every second. Deals Damage to Enemies every second and reduces their SP.
■ Ally SP Recovery: 15
■ Magical DMG per sec: 450%
■ Enemy SP Reduction: 20
■ Moonlight Duration: 12s

Summons a moonlight walking on clouds for a set period of time. The moonlight slowly advances in the direction Yomi is facing. Allies within the moonlight recover SP every second. Deals Damage to Enemies every second and reduces their SP.
■ Ally SP Recovery: 15
■ Magical DMG per sec: 470%
■ Enemy SP Reduction: 20
■ Moonlight Duration: 12s

Passive

Increases HP Recovery for all allies.
(This effect activates even if Yomi is not on the field.)
■ HP Recovery Increase: 12%

Increases HP Recovery for all allies.
(This effect activates even if Yomi is not on the field.)
■ HP Recovery Increase: 13%

Increases HP Recovery for all allies.
(This effect activates even if Yomi is not on the field.)
■ HP Recovery Increase: 14%

Increases HP Recovery for all allies.
(This effect activates even if Yomi is not on the field.)
■ HP Recovery Increase: 15%

Increases HP Recovery for all allies.
(This effect activates even if Yomi is not on the field.)
■ HP Recovery Increase: 16%

Increases HP Recovery for all allies.
(This effect activates even if Yomi is not on the field.)
■ HP Recovery Increase: 17%

Increases HP Recovery for all allies.
(This effect activates even if Yomi is not on the field.)
■ HP Recovery Increase: 18%

Increases HP Recovery for all allies.
(This effect activates even if Yomi is not on the field.)
■ HP Recovery Increase: 19%

Increases HP Recovery for all allies.
(This effect activates even if Yomi is not on the field.)
■ HP Recovery Increase: 20%

Increases HP Recovery for all allies.
(This effect activates even if Yomi is not on the field.)
■ HP Recovery Increase: 21%

Increases HP Recovery for all allies.
(This effect activates even if Yomi is not on the field.)
■ HP Recovery Increase: 22%

Increases HP Recovery for all allies.
(This effect activates even if Yomi is not on the field.)
■ HP Recovery Increase: 23%

Normal ATK

Basic:
Casts a spell, dealing Magical Damage to the enemy.
■ Magical DMG: 60%
Enhance:
At a set chance, drops starlight to deal Magical Damage to 2 random enemies and reduce their Attack Speed. Additionally recovers own HP and that of the ally with the lowest remaining HP ratio.
■ Magical DMG: 300%
■ ATK SPD Reduction: 40%
■ ATK SPD Reduction Duration: 3s
■ Own HP Recovery: 16% of Max HP
■ Target HP Recovery: 16% of the target's Max HP

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