Hi,

hm my first impression would be:

1xProt-Paladin
1xHeal-Priest
3xMages

could be a quite good and simple to play PVE-Team,
but when you think about utility you might want to add a Lock for Soulstone/HP-Buff/Enslave
and I personaly wanted to add an shaman for totems/secondary healer/wipe recovery/another rezzer...

So you end up with a:

Prot-Pala, Priest, Mage, Warlock, Shaman

I play this Setup (now lvl64) and till now its fun and playable.
I allways must smily when I look at my bufflist

-only thing I'm thinking about is, if the shaman or priest would be zhe better healer...