2011 Ram dually: best susp. setup, tie-downs & hitch exten?

I put the Reese Titan 2 ½” Hitch on my truck, rated for 18k and they have several extensions available, I’ve used the 24”/34” extensions with my 3,500 lb trailer and have been very happy. Plus I saved so much over the Tork Lift stuff I can do more to the truck.
I also put on the R3500 on the titan hitch and it’s a simple drill and bolt deal but I just welded them on because it’s faster and easier.