Well good question Alcattle, my end goal is to fill out the remainder of my original account, i.e. fill any empty slots on my current realm. I also want to fill out on some new servers, one being KJ and another realm for a Horde set of teams.
I think that I may end up linking another 2 accounts to RAF (have 4 x 5$ keys in total) and use those to fill across 4 accounts and then transfer to the fifth for a few toons to vary out that 5th slot in the teams.
I know I do lose the toons off the RAF accounts but later I can always resurrect an account and transfer a toon even though it would be cheaper to do another RAF at the time, time wise this would be easier.