Given the stats of the characters Shaak Ti is the Thing?!?!
LOL, i would drop the gonk and the MTB. Drop the rest of the points needed to bring in Lobot. You never want to bring a MTB as a constructed part of the squad. If you hit San you are toast. Also the gonk should only be brought in through Lobot as well.
It is not a bad squad. I played against something similair. The thing i dont like is that Luke is pretty fragile, but if Shaak can cause enough interference up front you should be good. With that build you may also want to consider a rauntaun.