I actually prefer your full madness just because I do pvp from time to time. Also, I got Sith Efficacy and I dont feel like I'm getting much force back, and I pretty much spam my Force Lightning. Does it get better at higher lvls? I'm only lvl 28
Sith efficacy basically makes force lightning cost next-to-nothing, as long as you get the full channel off. Combine that with your natural regen, and your force will actually go up a bit if you do nothing but force lightning.