Here is my opinion :
Blader : best in pve (he can solo all dungeons from low level) , balanced in pvp
Force blader : balanced in pve (easy stunlock) , good in pvp
Wizzard : balanced in both pvp and pve : pvp - he can stunlock you and break your combo , pve - great stun from A. Master , G. Master , Completer skills
Force archer : good for party because he can heal , pve : pretty good , pvp : balanced and great dps
Warrior : great defense so - good for tanking but also greate dmg

Force Shielder : Magic force shielder - best in pvp (cannons crits are like 800+) , i dont know about pve sry
Sword force shielder - good in pve because of its defense , my opinion sucks in pvp