I'm pretty confident melee will work. That said I am going to do Commandox2 or Sagex2 first. Safer bet. For four boxing, Operative+Jugg+Marauder could work, or Operativex2 + Assassin+ Marauder or Opx2Assx2 for pure stealth team lots of DPS lots of healing! The last one, Op, Op, Ass, Ass is what I'd do if I 4 boxed for melee.