Aal's and fiberglass caps

For those of you that sport a fiberglass cap on your db cab, did you use an aal in the rear to alleviate the sag? If so, what aal? 1.5" or 2". Because the stock suspension is a joke, in the near future ill do all around shocks, a front ome spring lift, and aal's in the rear. I don't want a rear lean by adding a cap, so I'm wondering what works in the rear to keep it at a slight rake or level with the cap installed.

 

I used a 1.5" 3-leaf AAL and left the overload in place for a total lift of 2". I also lifted the front though. Without lifting the front also, the rear would have been really high. the stock TSB springs did OK with just the cap but they were flat and rode like crap and any additional load caused them to bottom out.