My new set i started to boost is a mixed melee/ranged team. On several accounts i will boost 2 toons instead of one (and keep them all on par). I liked the idea to swap em back and forth with my main team (pally tank / 4 shammies) once they are big boys, depending on the encounter.

So currently i have on account A: pally tank (lead from this toon), BCD ele shammies, F ele/resto shammy.

My new team (all 60ish)

A: ele shammy, leading from this one, with the intend to have a 5x shammy pvp team later on
B: tank druid, dps warrior (tank will be controlled 'remotely')
C: Disc priest, hunter
E: lock (want to add him in the mix of my main team) / mage
F: frost dk (should be able to take a beating as well)/rogue

I can boost them very easy in ramparts so far with my well geared prot pally (on A). My shammy on A i just boost with my 4 lvl 80 shammys. They blow up things very fast and so far it works. It's not an all day long boost. I do it about 45-60 minutes a day and let them build up full RT. They gain 1-2 levels each day which is ok with me.

Tests so far to lead from a dps caster and remotely control melee/tank are very fun and positive.