Took my 4 shaman to BRD tonight to boost with my 70 mage. Shammies are all 41-42.....think I will be heading back to ZF for a few more levels.
BRD is a pain in the ass to get to, and takes quite a bit of mana to kill 1-2 groups. I only stayed for about an hour and really didnt get much xp. Back to ZF- close to a FP, easy to pull a bunch w/ mount.

Man, boosting sure does slow down once ya hit 40!!