Found a video on AQ20 which highlights in particular all of the boss fights.
The quality isnt amazing, but its good enough to see how each one is done.
Its from a warlocks perspective, but can easily see what other classes are doing.
http://video.google.com/videoplay?docid=-2744810180568980756 (http://video.google.com/videoplay?docid=-2744810180568980756)