I've tried some different team comps.

DK Blood, Druid resto/Balance, Mage fire, Warlock Demo, Shaman Elemental/Resto(Stopped at 70)
Pally Prot, Druid resto/Balance, Mage fire, Warlock Demo, Shaman Elemental/Resto(85)
Pally Prot, Priest Disc, 3x Elemental Shamans(Still going)
Prot Warrior, Priest Disc, 3x Elemental Shamans(stopped at 80)

The Healer/DPS chars are the same, I just tried different tanks to settle on one.

I have to say of the combinations I have to say Paladin,Disc Priest+3xElemental Shammies are with out a doubt the easiest. I'd go so far to say that with Disc Priest + 3 x Elemental Shammies combo, it doesn't really matter what tank. Gonna level up the DK to try it. The Prot Warrior aint level 85 yet, but at 81.

I'm not all that experienced, but once I get my Pally, Disc +3xShammies to level 85, I'll have a better picture of it. The reason I think it's easier might also be because I have more experience with the instances, better gear, etc.