I am not near your point yet but here are my observations that you need to take into account
You can rub in four basic ways
1 top: rubbing on the top of the fender
-trim outer fender/more lift/reduce flex
2side: rubbing on the inboard side of the fender well
-off set rims/reduce flex/more lift
3front/back: rubbing on the forward and aft end of the well
-trim front and back of fender/reduce flex/more lift
4suspension: rubbing on control arms, springs, steering components, etc...
-special LCA's/offset wheels
ways to avoid rubbing:
1. More lift
2. Trim fenders
3. reduce flex
a. sway bar
b. bump stop drop
Taking these factors into account I could build an xj with 31's and 8 inches of lift that rub's like a dog (super flexy). I could also make 32's fit a stock cherokee (drop bump stops).
Botom line: Build it to do what you want and take everything into account