bagging the rear of a square body

I'm debating a 6/8 static drop or a set of bags for my new 88 dually and am looking for some guidance.

I know what to do with the bag setup for the front but what is the most cost efficient (cheapest ) way to get the rear done? I dont care if it lays frame but still want it low as possible. I am going to try to use this truck as a DD so I would really like the adjustability of air. I have a few other trucks that I can use when I need to tow but dont want to completely ruin tow capabilities either.

I was thinking of a flip kit in the rear w/drop shackles and running a helper bag, or can I do an air of leaf type setup? The helper bag seems like it might work but how much lift can I get with them? Thanks for any help

EDIT* I should note that my welding skills are not very good so I am looking for a bolt on setup.

If you are wanting the cheapest and easiest to install. Just get the lowering kit you prefer and put a helper kit on the rear. They bolt on instead of welding on and very reliable. You will get a few inches of lift out of these but they are mainly there to help with load ratios.