Last set of RAFing, I used existing toons to boost new toons.

With level 70 characters, boosting the new teams to 60th.
I used a Prot Pally, a BM Hunter and an Elem Shaman to boost with.

This set of RAFing, I'll use level 85 Frost DK's.
If I boost any allies (different server), I'll use an 85 Feral.