use the hunter to boost. it would be faster whether you AoE with the hunter or not.
it was drudgery having my friend rogue try to boost me through instances.

if you dont know how to AoE with a hunter through instances, its easy.
use a gorilla.
eye of the beast and pick up aggro, run around and around. cancel eye of the beast when you're far away enough. call your pet back.
mobs will reroute to your pet's new position. once they reach pet, use the thunderstomp to stun, lay down fire trap, run back and do a volley or two. slowly finish off the rest.

or use owl for its screeching ability and flying ability. no fall damage when jumping high ledges.


thats just how i'd do it. but you can use your rogue too. still, you should get about 2 levels every 3 instances. but it varies depending on your levels.