The lift that your gona get from an AAL or Shackles won't be as much as your Air Ride. I've researched that with my explorer vs one without air ride that did a TT/AAL/Shackles. Your air ride if working properly should give you 2.5-3" of lift. If I left the air ride on all the time I could easily fit 33x10.50's (with the 2"BL). However...If your going to go 33's Then ditch the air ride and do the traditional stuff (The air ride in off-road all the time will ride like ****). If your gona do 32x10.50 or smaller keep the air ride. Stock I was able to fit the 265/75/16's (31.8x10.50) with very light rubbing (my new rims have jack for backspacing) and no rubbing at all in off-road wheelin. But I wanted to do the 2"BL just for fun (doesn't effect air ride btw)
I decided to stay with the air ride because it rides very smooth and has a lower step in height for clients (I'm a Realtor)
If you decide to do the AAL/Shackles and keep the air ride you need to carefully measure before and after heights and re-mount the Air Ride sensor. Its not to hard. And not a bad idea to keep it on if you plan on ever towing because it will also level out for big loads on the back.