A
Reaper(Sorcery/Occultism/Shadowplay) - nice cc + high dmg from sorc tree, with passives from occ, also escape and invis
Primeval(Archery/Shadowplay/Auramancy) - best archery combo for now, because defense was nerfed, also got high mobility and extra mdef from auramancy
Skullknight(Occultism/Auramancy/Defense) - even with defense nerf, he is quite good and few of them with Imprison can control battlefield, also he got nice dmg against solo opponents, only Shrug it Off + boastfull roar makes smth about 4,5-5 k dmg without crit.
Shadowblade(Battlerage/Shadowplay/Witchcraft) - high phys dmg + extra CC, awesome combo to kill someone fast in PvP, in 10x10+, his job is to kill somebody and die =]
Darkrunner(Battlerage/Shadowplay/Auramancy) - also got high phys dmg with nice mobility, so if you'll take this guy no one will got a chance to escape, but like Shadowblade he got problem in large scale PvP
Tomb Warden(Defense/Auramancy/Songcraft) - pure bard, which is necessary in 10x10+ fights, because those buff is just OP
B
Abolisher(Battlerage/Auramancy/Defense) - he is quite nice tank, but he almost don't have cc, this build is better in PvP, than in 10x10+ fights he lost a lot =[
Templar(Vitalism/Auramancy/Defense) - most effective healer in game, but because of level cap 50, his heal isn't in best form, when level cap will be 55, he is worth of A for sure.
Hierophant(Vitalism/Auramancy/Witchcraft) - this healer build got highest heal in game, but his weaknes is that he lacks of survive against physical classes. He is good in arena or 10x10, not more =[
Necromancer(Vtalism/Witchcraft/Occultism) - good alternative for healer at level cap 50, because occ helps to regen mana and got few CC and buff against melee classes, which reduce inc dmg by 50 %, also plenty off CC from Witchcraft, like Hierophant
Daggerspell(Sorcery/Shadowplay/Witchcraft) - awesome in PvP, because got invis, high amount of CC and quite nice dmg, but in this build there is problem, like all wizards, if you don't kill enemie in few sec, you're death =[
Stone Arrow(Archery/Shadowplay/Defense) - he was awesome before nerf, but now he loose quite much ot his friend Primeval, but he is anyway better against physic classes
Spellsinger(Sorcery/Songcraft/Shadowplay)- got highest burst dmg in game, with invis and escape, but because of lack in points, he's not perfect now(you can take only invis for now, but with 10 point passives in sorcery and song)
Poxbane(Songcraft, Witchcraft, Defense) - good alternative for bard, but those cc you won't use too much, because they sticks close to healer and buff their songs
C
Blighter(Battlerage/Shadowplay/Defense) - got nice dmg, but because of lack in CC and mobility, anyone with Aura or Witchcraft can escape from him, but he is good against other melee classes
Trickster(Archery/Shadowplay/Witchcraft) - this combo is quite good, but problem is that Archery got higher range of attack, than Witchcraft spells, so witchcraft can be useed just to escape from opponent, but there is one more problem, you don't have high mobility, like Primeval to win fight, so you need to sit on horse and run away =[
Ranger(Archery/Shadowplay/Vitalism) - I think this might work, because bow and club is in to different slots, but any CC destroy him and he got only hearts as instacast and flowing life.
Inquisitor(Battlerage/Shadowplay/Vitalism) - As long as club got phys dmg it would work, but again, if you make mistake you can easily heal enemies with your heal, also same problem as with Ranger, any CC destroys him.
Cabalist(Sorcery/Witchcraft/Defense) - this build is like double-edged sword, from one side shield is quite nice, but on other hand we lose dmg =[
Caretaker(Defense/Songcraft/Vitalsim) - another build for bard/tank, this might be good combo, but it eats too much mana and after few casts you'll be out of mana =[
D
Justicar(Vitalism/Occultism/Defense) - quite useless tank, he have no CC, no mobility, but only he can tank kraken, thats why he is here.
Cleric(Vitalism/Auramancy/Songcraft) - would be nice healer, but his mana burst is too big =[
E
Any class, which mix magic and physic dmg