how to match rear with front set up

As of now my truck has 5100s set at 2", stock sport coils, and LR UCAs up front. In the rear only the TSB AAL and after a trip to moab, there's only one shock left back there...

So the front sits an inch higher than the rear with the bed empty (except for the toolbox at the front of the bed), and after losing that shock I'm ready to start solving this problem.

Obviously this isn't a high end set up by any means, but I do drive the hell out of it. So I'm wondering what your guys' opinions are about setting up the back. I don't have a ton of money to throw at this right now, but the truck is in a constant state of evolution so I'm also hesitant to put in cheaper parts that I will want to swap out later.

So any ideas are greatly appreciated about new leaf packs, shocks, bumpstops and flip kits, all that good stuff. Definitely need to stay under 1000, ideally closer to 500 but if any of it can be bought and installed in stages that would be a great help too