I'm not entirely sure what the best DPS would be, because that comes down to opinion, but the DPS classes are:
I think Berserker may be counted as a DPS class as well, depending on whether they're trying to tank or deal damage. I believe Necromancers may be considered DPS also.
I believe that if you wanted to be a tank, you should have gone Paladin. Berserkers are generally the more damage oriented class among warriors, and should NOT be tanking.
I don't think Necromancers have many damage oriented spells, they are more of debuffers.
Conclusion: I believe DD classes are Berserkers, Rangers, Assassins and Wizards.
On a side note, do you have to format your text...? It's a pain to read size 9 fonts...