So I attacked Nazeem with Wuuthrad and activated favourites when my Wuuthrad was in his back. I switched to the wabbajack when in the favourites and then exited favourites. Nazeem died from Wuutrad's damage and then the wabbajack done an explosion.
I have a video to show it. http://m.youtube.com/watch?v=tqZYMzzwCU0