Use Instancebuddy, configure your hunter CC properly, and you should get loads of xp.
I'm getting 350k xp/hour with a ret pally in full heirlooms running instances, at level 66. Unrested.
Yeah I use IB when I'm at the computer I'm just talking about afk stuff it seems like I'm really low.. Using fps hunter and zomgmage 68-80 grind