Boosting Mage,shaman with my 70 hunter?

Ive read lots of posts saying pallys and frost mages rock at boosting up alts. As i hate questing with dual boxing i felt i should use my 70 hunter to boost them through to around 50 then quest up to outland. My hunter is kara/heroic epic geared. i have experience boosting deadmine/stockades :P. Just wondering if using a hunter boosting up to 50 would be quicker and more efficient than questing. I dont need to get any money if that makes a difference just experience.

Post if using different class combo may help (mage/shaman). I ask this because reading through Brian kopps guide most quests 90% are kill x get x drop im not sure if killing something 4 times quicker would work out better or not.


p.s
i usually body pull then mis direct a explosion trap to my pet
Thanks a bunch,