Yeah, I am lvling my priest/warlock team now and I am considering the following setup when i am finished

Prot Pally
Elemental Shaman
Destro Warlock
Shadow Priest
Resto Druid

I know that people are opposed to shadow priests atm, but with their new buffs and a class I really enjoy, I find it a good addition.

Now, the plan is to use the druid and priest as dualspec dps/heal so if needed I can go holy priest / boomkin.

I'm not convinced that a resto druid will heal as well as a holy priest, but I do know it will be easy to macro and my druid already has tons of gear. Plus like I said if resto/shadow doesn't work I can still go Boomkin/holy.

SO, I end up playing 5 of my favorite classes and playing the game the way I want. Maybe not perfect, but check out raidcomp, its got all the buffs and debuffs you want in the game, spell power+ maxxed, haste, HP, Kings, Spirit, spell hit debuff, CoE to replace earth and moon, the only thing its missing is a BM hunter 3% flat dmg increase.