Boost actually looks decent where it is now. Bumping boost won't really help you too much in the scheme of things, just puts a more of a load on an already failing clutch. I'd work on fueling, the mid-rpm rise is concerning. Also, if you are really holding 12psi to redline, thats on the high end for these cars. I usually see 9-10.
Also, was this car done opensource or cobb?