I've just started... well am configuring... a group of five pallies.
Not sure I will play them far, but have wanted 5x Shockadins for a while.

I really like heals also heal each pally.
And heal your Beacon target.
Should be lots of passive heals, for healing others.
And then bubbles and five healers.

Plus get to experience Cataclysm leveling content as a horde from level 1 up.
I've not leveled too many horde toons.
Doubt they'll be interesting from 1st to 85th.
Will probably do it in three or four spurts.