This frost death knight two hander pvp arena Talent Spec is a high damage spec that will keep you busy with procs, but is fun to play and has medium mobility and good control.
This retribution paladin pvp arena Talent Spec is a spec that puts out a lot of damage and has ok survivability. There is little variation in ret specs.
This blood death knight pvp arena Talent Spec is a fun spec that has a lot of self healing and actually puts out good damage. I personally run this spec in 2v2 sometimes for fun.