I came up with some fancy setup done in Excel before I started RAF. I am limited to only 6 slots on my main account (keeping my 4 current toons on the opposite faction) and had certain things I wanted to get max RAF level while leveling. so after getting a paladin as my main 5box tank on my main account I can be more flexible as I level my other groups. I'm planning on having a "main" tank and healer on my 1st and 5th accounts with the occasional tank/healer spread around in the other 3 accounts. Since I don't have a way to get boosted, I'm having to manually level all my teams. Having a tank and healer on the 5th account will allow me to gift to my 3rd and 4th team and use that tank/healer as theirs. So I'll split time between the tank/healer on my 1st and 5th account, but still get 4 viable teams for instancing with. I also manage to get all 10 current classes on my 1st and 2nd accounts, that way if I decide to downscale down the road, I can keep 2 accounts but still have access to all classes.

In the end I'm still just doing a modified Tank/DPS/DPS/DPS/Healer where I can swap my tank and healer slots.