I don't think you understand what the word burst means, burst as in a burst of damage all together. A Shadow Tech Force Breach is essential to the burst an infiltration Shadow can do. A Combat Tech Force Breach is nice in a large pack of Sith since AE but still not burst. Also to keep an infiltration spec dps going you need to get Profundity or you will be out of Force constantly. This is why a Kinetic/Balance hybrid is good with Combat Tech, the increased Force regen keeps it going for more constant pressure as opposed to burst.
P.S. awfully defensive for someone who came to the forums asking for opinions. I have tried Combat Tech and I prefer to burst someone down as opposed to just being in the fight longer.