baja mode, all TC and SC turned off. (if you dont turn ALL of the nannies off i.e.- one tap on the tc button, then press and hold for 7 seconds, the truck will pull power just before every shift).
I'd agree with no manual shifting. It sucks and is SUUUUUUUPER laggy/lazy.
Air down to 18-20 PSI. If you don't have traction bars or a torque arm, you'll want one before you're done. I would not want to hit any speeds over 40 mph on 15 psi.
I'd also try throwing some 98 octane in the truck. you'd be amazed how much more timing you can add on these things with 98 or 100 octane race fuel.
a 2 step won't do jack for you and Baja mode will mess with the wastegates to keep you into boost and minimize lag.