If your focus is PvP and you want to be more of a damage dealer then a tank you can go berserker or gladiator. Both classes can catch people by surprise if they're not ready. When I was Berserker I could literally full to 0 people in the solo arena with a Chain>Savage Kick>Cleaving Strike>Overpower combo, even without any tenacity stacks. Crusader typically plays to outlast/outplay people in arena while Gladiator will be difficult to get away from with their extra gap closer and slow. All are viable options.