As scram suggested, a hellwig may help, but it will be slight.
Adding helper shocks/spings won't help sway, they just prevent you from hitting the bump stops, nothing else.
Sway is caused by 2 main factors. The front end being too light, and the trailer catching lots of wind. Too put weight on your front you need to get it off the back end, either by dialing in your WDH, or by lightening your tongue weight (different trailer, or possibly arranging cargo in the trailer). To mitigate wind sway, you can purchase hitch sway bars which make it harder for the trailer to pivot on the ball. Best hitch in the business for that is the hensely stinger (pricy) but eliminates this sway completely. Other WDH's like the husky centerline have it built in, but you can purchase add on sway bars to help out.
I think you're overloaded though. I wouldn't pull that trailer with your truck. Just my pair of pennies.
Edit: reread your post, you actually didn't mention what problem your hoping to solve. For some reason I thought you were dealing with sway issues, so will leave my reply in for that. If you're trying to reduce shock travel, bags may help for that but again, I think you will have to worry about sway at some point with such a large and heavy trailer.