Mack

Perhaps an item needs to be created or something. I'll work on something.

Essentially, if we wanna take this from a no magic\cannon stand point, then potions should be allowed. 2 times to my knowlege potions were used by one person on another, or attempted to be used in the case of the Kobold boss scene. So, cannon wise it fits. But again, it would be too spammable. A healer could just run around and break potions on people every turn.

I agree with Mack, something needs to be adjusted or an item needs to be made.

Being used on every turn isn't exactly spamable. Especially since You might get 2 too 3 turns in a boss fight ( likely the only place it'll ever get used). You also shouldn't need a skill to use a potion or a Crystal. I guess You could use it to improve the effect of a potion or a Crystal, but that could quickly become over powered. Really though, it should be a one and done skill, and not a ranked one. Maybe it take a heal item and turns it into a hot. Or maybe with first aid yoi can treat a heal item of any quality as perfect tier. Maybe it could let you remove a status effect. Who knows