Actually I defeated her as a mage by using hell spikes on her and on her deathknight. I had lvl 5 spellshield and lvl 5 Magic Shield which protected me a bit for the occasional times she was able to cast hell spikes on my poor self. My deathknight helped also to keep her deathknight busy. In the wastelands I actually only used lvl 5 hellspikes to dispose of the more difficult buggers. Great spell it is, hmmm, hmmm.
