hmmmmm... all interesting ways of killing her. Here is what I did. Every time she summoned a death knight, I paused the game and decimated it with Elemental Bolt, then used resurrect on it. I then cast deadly discs. If I didn't kill the knight, then I used level 5 aura of command on it and took it over. Had about seven dreadknights on my side attacking her. she cast blind on them, but not on me because I went out of range. What was really funny is that I had a tutaman on my side(resurrect + aura of command) with level 5 resurrect. She died in about five minutes. Is actually kind of funny to see her get pwned by her own demons and a zombie vampire. I cast one spell on her, elemental hail, to finish her off.

I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones.
Join the Army, meet interesting people, kill them.