Section 15: PvP
There's a short PvP guide here, if you haven't already seen it.
Q: Which is the most "overpowered" class in PvP?
A: Champions and Mercenaries are capable of the highest damage output with Tetra Punch. To a lesser extent, Witches, Wizards, Dukes, Divas and Gamblers can also deal very high damage. All of them are generally considered versatile in PvP/GvG, and the best classes to play if you're a frequent PvPer. But all of this is only matter of opinion. 
Last edited by Aria; 08-01-2012 at 05:51 PM.