Something like this build is what I have in mind
Icon Basic 7” box
Icon 7” Springs
Icon VS 2.0 shocks or Fox 2.0 shocks
Icon or PMF Radius Drop Brackets
OUO ALA or PMF Arms
OUO 8” block, 5 degree taper with traction bars.3/4 U-bolts, Air Bag Tabs
PMF dual stabilizer with Fox shots
What else is recommended?
Sounds like a good set up, but there isn't much need to mix and match so much unless you just want to. I would consider doing the rear spring from Icon, or even Carli's replacement spring, then get whatever block/traction bar set up you need to get the lift height you want. Improvement in ride quality over stock is considerable.
I've got the Icon Piggybacks, and they are really nice and ride great. Fox obviously makes good products too, so I don't think you could go wrong either way, but I went all Icon since they tuned all of their stuff to work together. That's one reason I just went with the whole set up from Icon...they have it all put together to work as a system. I haven't looked at the OUO or PMF arms in details, but the best ride quality typically comes from the factory arms dropped. The big rubber bushings in them help absorb a considerable amount of road vibration/bumps that help prevent it from transferring to the frame. If the PMF or OUO arms have rubber bushings then you should be good to go with those. Obviously I would defer to those guy on information about their specific product. I thought about doing a 4-link on mine like I did on my Excursion, but I'm glad I went with the radius drop and kept the factory arms.
For airbags, I would suggest you either go with the Carli long travel bags, or get the airbag cups that allow you to mount a regular bag without attaching the lower portion of the bag to the axle. I admit to not knowing about the airbag tab set up from OUO, but I can tell you that I have witnessed regular (non-long travel) bags adversely effecting ride quality. A friend of mine had regular air bags installed temporarily on his F350 (I think they were Ride Rite) while waiting for his Carli's, and once the Carli's were swapped on you could tell a considerable difference in rear ride quality. His 350 has the Carli 4.5" pin top system. Admittedly it might ride a touch smoother/softer than my Icon set up, but I wanted to go higher than 4.5". I think part of what helps his ride so good is the very light weight capacity Carli rear spring. It's almost as soft as a half ton truck suspension.
The adjustable Trac bar that Josh mentioned is a good idea as well. I was impressed with the Icon one I got. Beefy for sure.
