I think Flames of Insanity is fairly important, especially at this point in the game. The hardest boss to beat is susceptible to FoI, and it works well on other tougher enemies, so I amped that one up. My build is totally geared towards offense and is

Flames of Insanity: 6
Amplify Pain: 6
Neural Shock: 6
Sympathetic Anguish: 6
Inner Focus: 1

Obviously, I depend on engineers and stims a lot for HP, as Inner Focus hardly does anything for me. I survive just fine, however.

Another reason I concentrated on only four abilities is that I do not like the ability map system in SL. If I could display all 8 ability spots at the same time like in PL and not have to tap to switch over to the second slot, I would balance my skill points out a bit differently.