There's a nice spot in Icecrown for frostweaves and greens. If you browse youtube you can probably find at least 50 videos of some level 78 (or 80) pally chain pulling the place with the aid of their hand of freedom and consecrate. Heck, even hunters do a pretty good job and so do warlocks with their pets.
Priests can do it too using any of the three spec, but I think Smite is by far the most efficient. Enjoy.