Need some input on setting up my rear suspension with notch

[six5]

Alright here is the deal. I just finished up my notch on my truck. I am going to start building my new lower control arms and wishbone setup. What is the preferred pinion angle on the rear end? I am thinking 4 degrees up? And I am assuming I will need to set the pinion angle for ride height because the pinion angle will change when the truck is fully aired up or aired down?

Any suggestions or tips are welcomed.

Thanks.....