Hmm, I have lvl 11 preciseness + lvl 10 intensity, 83 talent in magic attack skill, and lvl 42 justice staff. She misses quite a bit TBH. Her heal is around 4xk which is not bad when it lands, but it doesn't land often enough TBH.

Maybe if a preciseness 12 rune + a few +hit saints would help the hit rate on the heals?