I'm also not sure on this myself, but I was under the impression that spirits should be subject to stun damage, maybe they happen to have a common and unified damage track?
Well, as I said, I really don't know about that.
But right now, I'm out of time. If you want to speed things up, then consider that Alex used his Fear power on the spirit, then (and, if it's possible, on both spirit and magician).