i raid as full sab http://swtor.askmrrobot.com/skills/gunslinger#c-9e8e68c0le-1c0k is my spec.
I'm usually at the top of the dps meter on most fights, especially anything with an add phase. Currently working on NiM tanks.
My rotation basically consists of keeping up VS, SC, and keeping IG in a good spot, then sabcharge, speedshot, aimed shot, and flyby, keeping everything on CD as much as possible, using Coolhead and sabotage either on CD or during opportune moments... most fights i don't have to autoattack at all, (because of movement, phase changes, etc), and i'm rarely low on energy.