IMHO, you are wrong. If you upgraded shafts and joints in your turdy, the ring and pinion will be the next to go if you go bigger with tires.
Also, if you go from 35 to 36 tires, you will lose your ass when you do your axles upgrade because you likely won't be happy running 37s with an axle that could handle 38s or 39s. Do it right the first time.
Unless you plan to make a giant money pit, you need to sit down and figure out what your next step is. Getting to 35s on a stock-ish TJ is pretty easy and can be reasonably reliable. Bumping past that and you'll be blowing parts on a regular basis unless you only use the jeep to cruise or run 2-tracks.