The purified mist status effect heals tamed mobs, which allows for the projectile from the staff to heal your tamed allies. However the vigorous fog attack hurt tamed mobs while applying purified mist which them heals them. I think it would a nice QOL change to either make the vigorous fog attack either do no damage to tamed mobs and only apply the status to them, or heal them on top of applying that status.

Sounds like a good change, will implement that.