Holy Knight| Lv.3, gain spellcasting like Eldritch Knight but using wisdom and Cleric spell list. Also, any weapon attack you make deals radiant or necrotic damage.

Lv.7, when you second wind, you give an ally within 60ft 1d12 fighter level Wis mod temp hit points

Lv.10, whenever you cast a spell level 1 or higher that targets an ally, that ally gains adv on its next saving throw for the next ten minutes.

Lv.15, whenever you heal an ally using a spell, they gain temporary hitpoints equal to 2x your Wis mod.

Lv.18, increase your second wind temp hit points to 2d12 fighter level wis mod. Then another target takes damage equal to the total healed if they fail a Con save.

This is my first homebrew subclass, I wanted a Cleric version of the eldritch knight. I might make a Druid or Bard version as well. Be harsh.

Edit: edited based on suggestions