this isn't exactly the answer u seek,
but i've not read much on this forum about aftermarket 1/2 ton ram tweaks on the newer trucks...
((so until some1 jumps in with real advice, here are some thoughts))
this truck has the multilink COIL rear suspension right?
and probably has 20 inch rims/tires?
there are a boat load of suspension mod info/posts available on many of the ram enthusiast forums...
but wear high water boots while reading when u go there.
as u know the 'rating' for the rear won't change without major upgrades (axles, spindles, linkage, springs, hubs and so on)
the new coil set up comes in at least 10 ratings from dodge and there are dozens of aftermarket up grades for the coils.
for example poly urethane spacers are available to 'lift' the coils and that's a simple/inexpensive tweak.
won't be my first choice, but that's irrelevant.
lift kits can be elaborate, with no upper limit on price.
it's not as simple as adding a leaf or traditional air bag assist with this newer suspension design.
as dull as it is, the place to start is the beginning.
weigh the truck, weigh it hooked to the stream, weigh it to adjust the w/d gear.
use the w/d gear to REload the front axle to baseline.
IF the 2 axles are then within capacity/ratings, try that for towing.
(and don't forget 2 properly inflate the tires (they are p metric or LT tires??)
IF after REloading the front axle, the REAR axle is over loaded...
TRY using more w/d to shift some of the extra forward.
this will mean MORE tension on the screw jacks (try it) and might require stronger w/d bars.
this adjustment process can be done using a tape measure but scale weights really are the gold standard.
it can take all day to fiddle with this info/adjustments and make test towing loops on to the roadways.
IF u have not been through weighing at a cat scale here's an old thread with the basics...
there are others that provide info on the process and axle loads and adjustments.
timbren bump stops (taller than oem) are an easy/safe way to provide some help for rear squat.
a rear anti-roll/sway bar for the truck (upgrade in size) may be useful
poly urethane bushings, stiffer coils, coil air bags, coil spacers and so on...
the options are many but for towing we really need to understand the weights/redistribution and proper hitch setup parameters...
that's not exciting stuff but is important and will pay off long term.
it's easy to begin a game of 'wack a mole' but hard to win just by adding gadgets.