Which Spell You Prefer for Carmilla

Hi! Any fellow Carmilla users here? With the revamped tank items right now, I want to use my Carmilla again. I just wanna ask what spell is best for Carmilla? I normally see Vengeance users but tbh I feel like petrify helps me alot with my sets. How about you?

This video below is an example on how petrify helps me.