You’ve got good advice. Watching this forum and my expertience with multiple TJs, it depends.
2” is probably limit on stock, maybe look at 2” only.
Above, it probably depends, lifting can cause vibrations from the Transfer case output to driveshaft to axle, angel too steep.
You can put a cheap TC drop, 6 thick washers basically, under the skid that holds up the TC, and you’ll change the angle back down enough to stop vibes.
You go high, it’s a whole lot of stuff. Read Chris’ thread on “Somyou want 35’s, 4” lift” and you’ll see all the things you should do to lift a TJ, you’re just on the beginning end ha