after 2 weeks testing pure ars and pyro builds (not so much, and i noob and hate mix builds) i choose for myself in pvp only PYRO. I can run and damage in 1 time, stopping sometimes to cast unload. Today get 2 immortals, one on huttball, one on alderan. It's so awesome when enemy team don't track you, because they just cant target me) Incendiary missile, rail shot, thermal detonator and hide in cover ^_^ 300k damage medal easy in arsenal and easy in pyro to get, didn't see any difference.