Make sure your tires are rated to haul the weight you will have in the back and inflated to that pressure. I would consider adding Torklift lower stableloads instead of the Supersprings if either is actually needed. Also, make sure your airbags have only the pressure you need. Too much will cause sway as the leaf springs are unloaded. You may find 20-40 is more than enough pressure in the air bags.
The rear sway bar is definitely going to be helpful.
I’m not sure what they are calling Super springs Overload Leaf’s. If they are the ones that I’m thinking of, they have a similar purpose as air bags which you already have. Some say Supersprings will sway less, but I can’t imagine having both on it.
Finally, are you planning on towing?