In my situation I will just be riding it around town and an occasional highway 98%of the time
Yea, that is where the 5.13s would be really good. Strange to think of 5.13 as a good highway gear, but they would be. Comes to an effective 3.42 gear with the AOD. And the AOD has a locked convertor in OD, so no fudging a little slip, its locked like a stick shift would be. Now 3.42 gears and 35" tires, that's still pretty tall geared. I can remember my first bronco running around with only 31s on it and 3.50 gears. And I know I was pushing a lot less air then you will be, you have a lift and taller tires I didn't have.
If you have 3.50 gears and a C4 already, 5.13s will be even less RPM. Geared a little taller, and a locked convertor.
You need enough gear that at cruising speed you are still pulling some manifold vacuum. If you are not pulling vacuum at cruise the engine is running a peak torque (at that RPM), you have no reserve capacity to pull a grade or accelerate, fuel and timing will be in "power" delivery and not "economy" mode.