I run warrior/cleric/rogue/mage/mage. They are 39 atm.

My only advice would be to make at least one of the mages a chloro for the passive healing and keep the rogue ranged - I use ranger/marks/'sinn. Cleric is still my active healer in instances but can DPS (ranged) when questing. I've had few problems with instances so far.

Alge