Damn man, 1-ton leafs AND air bags???
Heck, my Air Lift 5000 bags made a huge difference for towing and hauling...
They're designated with the "5000" # cuz they'll support 5000lbs...
I think I'd just start with the set of bags for the $150 they cost and go from there...they're super simple to install too.
FWIW-
I know with 80psi of air in the bags (out of the 100lb max) I can have a big CAT quarry loader literally drop a full bucket of wet sand, wet dirt or gravel in my bed (which fills it to the rails) and the truck doesn't squat an inch and it still rides like a dream, and I've got my overload leafs removed from my spring pack! But I did add a Deaver 2" mini pack, not for load capability tho, I did that for height instead of using a block when I lifted the truck.
I only tow with about 30lbs in the bags too...
Then when I'm not towing or hauling I let all the air out and I've still got a fairly decent ride...