I have never PVPed in WOW, plenty of experience in Eve and recently in SWTOR, but never in WOW. (Aside from the odd world-pvp gank.) I'm very keen to learn, but specially with RAF ongoing, not so keen to do it on 'just' one toon. What 5-man composition would be viable/easy to learn with? Is it viable to level purely via pvp? What pvp options exist for leveling a 5-box with?