I really don't think you should have to adjust the height of your hitch because of having air bags. If there is a problem then it may not have been set up correctly from the get go. I have Firestone Ride-Rite air bags. I normally air them up before hitching to 35 or 40psi. When hitched up, the truck is level, or close to what it was before air and hitching, and the trailer is level. You have to test different inflations to see what works for your rig. When not towing I run 10psi.
Peace
Dave