Oh, so there is the place where Pixie Queen can shine, eh?
Pixie is physicaldamage hero, so the answer is literally have been given in this topic earlier: use spectral.
For the best effect, add Moon.
Theoretically she can damage your Spectre with Rejuvenate (the only magic damage sourse she have) but I believe it's not that powerful to oneshot your spectre (if it is level 121 and equipped ofc).
Moon will stay behind spectre and will charge spectre to cast possesion. just make sure your spectre eat the clone first.
If you don't have the spectre then charged Tomb Angel is your last resort.
Don't know what else could help you here