Truck Suspension

Shock absorbers are designed to primarily control the rebound of the suspension, they cannot make the ride softer.

You want a truck to ride softer, put some weight in it. In the meantime you might want to lower the tire PSI a tad.

I have a 2010 Ram 3500 4x4 CTD megacab with Bilstien 4600 shocks front and rear and Firestone airbags on the rear. I run 55 psi front 65psi rear unloaded. When pulling our 39' 5ver approx 13.5k lbs I run 60 psi front 75 psi rear with 50 psi in airbags. The loaded ride is level and great but empty not towing is really not so great. I think you are better off with a stiff unloaded ride and a smooth loaded ride.

What psi are you running in the rear tires.? It's possible they're aired up too high. I run 45r and 65f in my 2500 CTD. Not 1/2 ton soft but about as good as I can do. I do have Bilsteins too.

I think that would depend on how much of a load you normally carry? If you will be carrying heavy loads at times you might be real unhappy with a soft shock. Personally I would prefer a stiffer ride and have the truck handle well when loaded.