You could also decide to level more groups, just for fun, to do or re/do the early quests in different starting zones. It goes so fast anyway with RAF (sorry Unseen).

Here are the groups I plan to play post 60 :

- Paladin (tank), Priest (healer), 3 x mage : the classical holy trilogy
- 5 x Shaman or Paladin + 4 x Shaman
- 4 x Hunter, Druid (healer)

I will perhaps prepare more (5 x Warlock ?) if I have enough RAF time.

More groups to 60 gives you more choice for the future.