3" Suspension + 1.25" body + MML is a pretty common set up for running 33's but like everyone will tell you, the higher you go, the bigger of a TC drop you'll have to do and eventually an SYE and drive shaft swap. You'll also hear that every Jeep is different (which is true) so you might be able to pull off a 3.5" and be in the clear and others will have problems with 2". You'll never know until you install it.
Just because I'm trying to play it safe as possible, I'm doing a 2.5" lift, I'll level it out in the front and put on Metal Cloak Fenders allowing me maximum articulation. That will be my set up for 31's or 33's. 33 and higher, I'll probably do a 1.25" body lift + MML and call it a day. Really with that set up and the Metal Cloak fenders, I could technically run a 35 or 37 but then I'll have to do some gear changing (More $$$).
I'm not expert. Just sharing what I've read and been told so far so feel free to correct me if I'm wrong so I won't spread misinformation on something.