How to control torque with supercharger

I have a bit of an odd question:

I live at 6500' in Utah and so my ambient air pressure is 20% lower than sea level. Within about 30 minutes drive of my house I can be as high as 11,000' or as low as 4200'. So my air pressure could range anywhere from 70% to 88% of sea level air pressure. What I was thinking is that I could overdrive the supercharger so that I get decent power at high elevation, but I want to be able to control torque at low elevation. If I am making 500ft-lbs at 10000', I don't want it to be making 650 at 4200'.

So what is the best way to make this happen? Do you use the Desired Air Load table to limit the manifold pressure?

I am used to tuning my Ecoboost so the 5.7L seems like a little bit of a blend of load and MAF based tuning and haven't quite figured it out.