I don't really care for witches that much, though. Maybe this changes on AW, but the slowdown effect is negligible so their only real use to me is as cheap magic damage. As a result I've thus far been fine with just Cloris, although I'll check out Belinda.
I do, if the archer's name is "Rita."
Oh, Rita does indeed wreak havoc on flyers. Even the red gargoyles/flyers/whatever go down in seconds. Of course, I don't even use her for Spirit Rescue X, I use Bashira.