As a 22 chanter who has played for the last six weeks or so, I will say I have seen plenty of tanks to group with but only rarely saw a cleric.
other than that, i rarely see wizards.
lots of enchanters, necros, and druids, ogre/troll tanks, shamans
warriors can't hold aggro for shit until they get proc weapons (not their fault; it's game mechanics) but of course have better survivability and dps than their paladin/sk. (they have dual wield and higher offense and attack skills, defense, etc.)
edited to give more credit to warriors
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