Quote Originally Posted by TMNT
2 Ele shams
2 shadow priests
2 warlocks
1 pally tank
1 holy priest(aoe heal spam ftw?)
2 uhh...whatever you would like...more shams for the quick dps?
For instances better to have 2 tanks in total, at least 3 classes capable of being healers for end-game, rest as ranged dps. A mage would be handy for some extra CC and portals/food/water. 2 SP and 2 locks is a good call for dps, work well together

Maybe:
2 locks
2 sp (could respec 1 holy if needs be)
1 pally tank
1 druid (able to spec to suit the requirement)
1 mage
1 paly or priest healer
2 shamis for totems and added dps, also able to spec healers...

For pvp? 2 combos of 1+4, such as 1 pali 4 shami or 1 priest 4 locks, something along those lines. 10 shami would be pretty sick, 10xCL will pretty much tear up any medium sized group in no time.

Levelling them will still be the biggest challenge