Gotta say, Estelle is pretty DARN powerful.
Skill that that not only doubles the attack, but also stomps enemies MR pretty much to ground (-70% MR to all enemies in range means, against that highly-resistant foes, not only her performance will be better, but also that of your other magic-based units as well).
Passive that powers Mages, Bishops, Mage Armors, and Magic Fencers good (and lowers their cost!)
And black tier stats that will do 770 damage a pop in AoE raw and 1.5k damage a pop in AoE with her skill on (maxed). And bonus range from affection (in addition to usual bonus attack).
Definitely an exceptional unit to pull.
ЗЫ. Oh yes, and her SAW lasts
two. freakin. minutes!