[Bozos of Bones]

First, make sure that you killed her main help teams, the Cult of the Dragon Necromancers and the Crystal Golem. After that, likk off the barbarians that are with her, and then pound her. The thing is, she can 'fly' and go to the top of the steps, while they are too slippery for you, so you need to hit the levers at the top of the stairs to re-enable them to get to her. Next, pound away at her like there's no tomorrow, and ignore the soarsmen and the Aurilites.