What type of gas have you got?
Here's basically what I would run on our 92e10 here in MN:
Conservative tune: 20 PSI tapering to 18 at redline
Agressive tune: 22 PSI tapering to 18 at redline, or if the turbo liked it, 20 PSI at redline
If you've got or can find a compressor map for your turbo, that'll help you be able to nail down boost targets much better then my guessing.
I would set boost targets at around 18 at 3200 and 22 at 3500 and hope to get it, and begin tapering at around 5500 RPM.