World of warcraft cl?

It depends on what you would like to do from an arena. an arms warrior can do heaps of damage but can also die rather easily. Ret paladins do less damage than arms warriors but have lots of buffs, stuns and bubbles at there disposal. For priest expect to die tbh. Shadow is a good pvp spec as it has buffs and a very useful m fear (physhic scream) Disc is a very good healing spec as you can do damage aswell as heal (Penance) and you get no cooldown on bubbles. If it was me i would go with a discipline priest as they are the more versatile cl. You can do nice damage aswell as heal up and protect all of your allies. Hope i helped, (PvP priest and warrior) <-----