Up in the Permafrost region lay the stomping grounds for characters level 40-50. Ice giants, skeletons, Vox’s cave, and griffons were just some of the XP spots that were constantly fought over.
The ice giant cave was one of my favorites. These mobs hit slower than the skeletons and seemed to be a marshmallow for melee attacks. I believe some rare sword dropped here… maybe the column that was pretty heavily valued? Either way, it was always good and fast XP.