L40, PvE build

[PianoWizzy]

I have no interest in PvPing as a comm for now, so I'm looking for some commando builds to further optimize my Voleria tanking. I have just hit 40 on my comm and so far have not used the last three abilities XD

Evidently I'm decent anyway but I think there was something about Back Breaker I hear being important.

My current build:
3 3 6 6
5 5 5 6
0 0 0

While tanking I like to use Gravity Well + [that slowing thingy] + Singularity, followed by Stomp once any of them get up.

Could I take in some suggestions for point rearrangement and combos?