Best way to do this for pure DPS and not healing would be to mix up the points
Some gear with power, some with crit rating, and 1 or 2 with alacrity, if you have the skill point for alacrity, then you won't need to add that as much
Most of the commando skill are channeled and alacrity would speed them up
If you want to go pure crit rating, then add surge rating also