Mage: 17/0/44 is the best else you will have a very now i mean VERY hard time against casters without the silence. Heres the spec i got on mine: World of Warcraft Europe -> Talents
Or you could try a 2/7/52 spec but this one requires very good gear if you gonna have a chance:World of Warcraft Europe -> Talents
Warlock:
I would suggest sl/sl spec: World of Warcraft Europe -> Talents
very good survival even with 10 k hp and about 100 resilence you can take down s2 casters except warriors and rogues.
UA: I would say this spec is only efficient if you got a healer or a shadowpriest in youre team else it will have way to low survival if youre bad geared.
World of Warcraft Europe -> Talents
Felguard spec: This spec is almost as good as the sl/sl spec its a very good spec for bad geared players as you have the felguard doing most work
World of Warcraft Europe -> Talents
Priest
Discipline healing spec: Very good survival, very good healing if you gonna heal in the arena you must go with this spec else you wont stand a very good chance.
World of Warcraft Europe -> Talents
Dps spec: Would say this one but feel free to comment it i am not very good at priest specs. World of Warcraft Europe -> Talents
Hunter:
Now it depends if you wanna play 2v2 i suggest a bm spec
World of Warcraft Europe -> Talents
If you play with a healer i would suggest a marksmanship spec:
World of Warcraft Europe -> Talents
For 5v5 its marksmanship aswell but if you have a healer in 2v2 i suggest a mm spec it can be very efficient.
Paladin:
Holy pvp healing spec: probably only spec that will get you anywhere World of Warcraft Europe -> Talents
Warrior:
arms mace spec: Best spec for warriors in arena if you have another weapon just change wep specialization World of Warcraft Europe -> Talents
druid:
My friend play's with this one: World of Warcraft Europe -> Talents
Good survival and efficient healing spec
moonkin: This one requires alot of good pvp moonkin gear if you gonna stand a chance:
World of Warcraft Europe -> Talents
Feral: If you gonna play with a rogue or a mage i suggest a feral spec if you have gear for it.
World of Warcraft Europe -> Talents
Rogue:
Combat mace: If you got maces go for this one probably the best arena spec for rogues atm: World of Warcraft Europe -> Talents
Dagger Build: World of Warcraft Europe -> Talents
sword build:
World of Warcraft Europe -> Talents
shaman
Resto spec best shaman spec to begin with in arena if you have healing gear: World of Warcraft Europe -> Talents
Elemental spec: This one can be very good and effective tho it requires good gear aswell: World of Warcraft Europe -> Talents