When you upgraded to the Koni Shocks, were they the FSD series?
Our coach is mounted on the f53 chassis that gave us a very harsh ride until we installed the FSD"s on the front suspension which significantly improved ride comfort.
Last year I had the Firestone Ride-Rite air bags installed on all 4 corners which seemed to further enhance the ride comfort. I run 70psi in rear bags and between 15 & 20 psi in front bags.
Good luck with your ride improvement project and safe travels