I rant the #1000 Air lift bags in my springs on my Avalanche and they were pretty awesome. I decided to go all in which added more weight, so I swapped from my stock springs to Eibach Springs for a Hummer. Coincidentally, just prior to changing to those springs, on our last trip through DV, one of my bags developed a leak. With the new springs, I did not need to replace the air bags. Moral of the story - high quality, heavier duty springs make all the difference in the world.
//
I would look at OME Cargo Springs, I also think Eibach makes a heavier spring for a lifted JK, Moog might also have something.
//
These are what I installed. My foot is a size 12.5.
View attachment 406519
//
Something else to consider - Fox 2.0 shocks stock valving are typically on the softer side for more traditional offroad performance. You may want to consider getting them revalved for the extra-weight associated with overlanding. When I did mine, they are completely custom for the extra weight and longer distances/durations: Fox 2.0 body, custom valving, 7/8" shafts, and bigger resrvoir. Something to consider.
View attachment 406521