SKs drills Mid Refess quite nicely if they use pure SK instead of Falkow SK. Buncles and orks can also put up quite a bit of a fight.
In any case, the issue with the nerf is that it didn't address the parts of miff that are broken:
A) locking out EN's utility units and all great spirits (Emana/Mystere)
B) 55 HP on a unit that generates SP on auto for free.
C) The fact that miff can actually hit back while generating SP, and where Judie/verlaat/gen orders is involved, this is no joke--she's right up there with marduk and urgrant in terms of the pain she can dish.
Seriously, just auto->action, HP: 55->35, agi: 1->2, range: 2->3. This will force people to make a choice--attack or SP gen. You can do your SP genning early on, then when you've set up your buffs and don't need it anymore, you turn around and start whacking with buffs.
In the meantime, you can give her the 20 heal back.