I don't know what you're planning to do with your Ram but outside of speed sport they're pretty capable as equipped from the factory. On mine the large size of the vehicle and its poor approach angle are the biggest handicaps - never articulation, never traction. Basically I can get over or through anything drama free as long as the bumper and rocker panels clear.
If desert race stuff is what you want it's probably not really on the menu if you also want to keep air ride.
If less adrenaline is more your speed and you need to cross extremely varied terrain then clearance is pretty valuable so AEV's four inch with the tucked skid is probably the prime option.