Wanted to add my experiences here if I may.
Went wheeling for the first time this weekend since my 3" IRO lift. Rubbed pretty badly in the rear but not horrible (not bad enough to break something) and had a front spring come unseated on the trail...not cool but caught in time it wasn't a huge deal. Backed down slowly and had a buddy pop it back into place before backing all the way down the obstacle.
With front bumper removed(painless and WELL WORTH IT to save your front bumper + additional approach angle) I did not rub anything in the front at all. My plastic fender liners are completely removed front and rear and my windshield washer fluid reservoir has been removed as well. Getting this out was more of a PITA than anything else really.
If you are gonna wheel like you've got a pair while disco'ed then I recommend installing spring retainers be added to your build sheet as well. I didn't plan to go disco'd that day but when I lost an endlink bolt I really had no choice but to disco both sides.
As a result of this past weekend of learning experiences I now decided I need...JKS QD's, rear bumpstop extensions(1.5" maybe? Running 265/70/17 tire), and front upper and lower spring retainers.
In this pic the spring is unseated though tough to see, I was further up the rock face when it popped out. Pic was taken after I had backed down some.
You can hear the rear rubbing in this video but the quality is horrible. I will run this again and shoot it with a real camera. And oh yeah, be prepared to crane your head 90 degrees to watch it haha.