08 w/ Lift kit, rebuilding suspension: what to upgrade?

I have a 2008 DC 5.7 4WD with 187,000 KM (116k miles) an (old) BDS 4.5" Lift Kit (2.0 IFP front and rear), 35" Fuel Tires, Falken AT3Ws and otherwise stock setup.

I don't drive my truck in the winter (I'm an arborist) so it will parked and up on stands indoors for the winter. I need to send in my struts to Fox as they are blown and need to be rebuilt.

While it's up and I have access I want to drop the suspension, do some rust work and replace and upgrade any old components to make it more reliable.

I am a 90% on road, 10% off-road driver (mostly level terrain), but regularly tow 5 - 8,000lb loads for work (booms, chippers, trailers, etc).

I also drive the truck as my main personal vehicle during the summers and take my wife and dog to the cottage often, so ride quality is important.

Are there any recommended upgrades to make the setup more comfortable and more reliable? I do find the ride a bit harsh and chattery.

Things I'm looking at replacing:
- rear leaf springs (mine are rusted out)
- sway bars (minor damage to my rear)
- control arms (fronts are rusted out)

Anything else I should consider while in there? Bump stops, ball joints, shackles, etc? Any suggestion on good quality options are appreciated!