I added a wulf 1.5" spacer and Rough Countrys forged UCA's for 3.5" lifts to my mopar 2". Ride is good. A lot smoother riding than it was with just the mopar lift for some reason. My tires were rubbing on the uca a bit, but I added wheel spacers which fixed that.I tried running the ORP front springs and I do not know how the others do it. The handling on the truck was abysmal. Also, I tried to fit 35 x12's (wheel = 20 x 10 -24 mm offset) with that set up and they flat out wouldn't fit.
That said, on the Mopar lift without the ORP front springs I have a 2" rake and I hate it. It looks even more exaggerated with the lift.
Please let me know if you go the spacer route as I tried to put the Motofab 2.5's on and that was a no go as well.