You cannot master a class which is almost worse than Powertech,the only thing which makes this class 0,1% viable is vanish. commando enet is going throught shroud/vanish shroud so you will just get punished since cross faction if you play against a good commando. Its not a get good issue,its just the class.
Giving it phasewalk and 30% less dmg while stunned for dps specs would already be enough to make this class quite good again in 4 DPS games. In 3 DPS 1 Heal game are sins even then too weak if you play vs marauders,snipers or mercs,just saying