Scroll down some, there are alot of excellant posts about where to hunt at these levels.
I like the warrens, befallen, and guk for your level, but I have never played a beastlord, so i do not know if these zones would work.
there is a post about beastlords and where to level. Not sure the title though.
Hmmm, not a real helpful post by me...
Sorry.