Im running 4.5" on 32s, but still may be able to help. I still had my flares when first installed and they rubbed in the back lower corner of the flare when turning. Im running Cragars that are 4" backspacing just like your setup. I feel that with just trimming to the back area of the flare it would have been just fine for road use, or occasional offroad use with swaybar connected. I know you are on less left but it wasnt lack of uptravel causing the rubbing as much as an anemic wheel opening in front and back of the front flares. With creative trimming to the flares you should be fine.
Heres a throwback to my rig back when I was running that setup. Rear is only about 4", so just imagine the front a little lower and its pretty much exactly what youll be looking at.