Longknife: Blademaster for if you wanna be versatile: not OP nor weak, but deadly for any class if played right and definitely ready for any battle or opponent.
Wizard for if you wanna nuke. Not amazing in 1v1 fights, but sometimes the difference between a win and a loss in group fights.
Barb for...honestly a barb is only good for PVP if we're talking about a demon STR-built barb with a zerk weapon that runs around biting squishies' faces off. Still really bleh in 1v1 fights, but can be devastating in group fights, forcing people to shoot at a hard-to-take down target if they want to save their best DDs. (would be tough to gear up though)
Veno for if you just wanna do drive bys, sending an OMGWTFBBQ bird at a person while you run away like a weenie.
Archer if you wanna kill quick as balls and don't mind relying on running and tactical retreats as your basic form of defense.
Cleric if you just wanna shoot fish in a barrel: sleep them, debuff them, chi up, triple spark and attack. Rinse and Repeat.
Assassin if you wanna be an OP jackass.
Psychic if you wanna play more strategically, with your life on the line if you screw up but in exchange for putting that same level of don't-screw-up pressure on your opponents. Also the best candidate for killing the above mentioned OP jackass.
Seeker if you wanna be a physical wizzie. Srsly.
Mystic if you want a nice variety of everything: self-healing, having a pet, fast casting, MANY different skills and tricks and good defense.
Wizard for if you wanna nuke. Not amazing in 1v1 fights, but sometimes the difference between a win and a loss in group fights.
Barb for...honestly a barb is only good for PVP if we're talking about a demon STR-built barb with a zerk weapon that runs around biting squishies' faces off. Still really bleh in 1v1 fights, but can be devastating in group fights, forcing people to shoot at a hard-to-take down target if they want to save their best DDs. (would be tough to gear up though)
Veno for if you just wanna do drive bys, sending an OMGWTFBBQ bird at a person while you run away like a weenie.
Archer if you wanna kill quick as balls and don't mind relying on running and tactical retreats as your basic form of defense.
Cleric if you just wanna shoot fish in a barrel: sleep them, debuff them, chi up, triple spark and attack. Rinse and Repeat.
Assassin if you wanna be an OP jackass.
Psychic if you wanna play more strategically, with your life on the line if you screw up but in exchange for putting that same level of don't-screw-up pressure on your opponents. Also the best candidate for killing the above mentioned OP jackass.
Seeker if you wanna be a physical wizzie. Srsly.
Mystic if you want a nice variety of everything: self-healing, having a pet, fast casting, MANY different skills and tricks and good defense.