I done pretty much what Coltimar suggested.

I had an account with a level 80 warlock and another account that I'd been boosting a pally (non RAF) with. I decided to add another account to get the RAF bonus. So far I've levelled the following teams from 1-60:

- druid/rogue
- shaman/hunter
- priest/warrior (ok, not 60 yet...working on these at the moment)

and have gifted :

- the pally from 31 - 60
- a mage from 10 - 50

I've already transferred the shaman to my original account...and will be transferring the warrior and druid in a bit. The plan is to cancel the 3rd account when I'm finished.

My route from 1-60 is

- level both toons from 1-8 in durotar (happens after doing first quest in the troll village)....if you use a race that doesn't start in durotar, use the summon friend ability
- summon them to orgrimar and use my lvl 80 lock to boost through RFC...I do this till they hit lvl 10
- lvl 10 - 20 they're boosted through WC
- lvl 20 - 40 they're boosted through scarlet monestary
- lvl 40 - 45 they're boosted through zul farrak
- lvl 45 - 60 they're boosted through the dead side of stratholme (no pesky random skeleton spawns)

The first duo took around 1 day 3 hours game time. The second took 19 hours game time. I'd like to improve on that, but doubt it.