Mudshack

I put on 1.5" lift shackles back in 2009. Now my 20year old leaf springs are flat...or even a little negative arched. I have a 1.5" spacer up front and Rough Country shocks all the way around (yes they are 10 years old, too). The ride is like an old Conestoga wagon. I no longer rock crawl. I want a better ride quality without going back to stock height.

Should I?:
1) Buy stock shackles and 1.5" lift springs and get 4 new shocks (unknown kind)
2) Buy stock springs and stick with my lift shackle and get 4 new shocks (unknown kind)
3) Just get 4 new soft ride shocks and call it good
4) ________________ (enter your suggestion I am not thinking of)

Battle

I'd get new springs and new shackles - because that's what I literally just did and have about an inch and a half of lift in the rear. I used Rancho 1.5" leafs with IRO 0-.75" shackles at the stock height setting.

I bet HD Crowns would get you about the same height and be cheaper overall.

You could also try to buy a lower mileage set of stock leafs and get a "full length" add-a-leaf like from Rubicon Express. Those are supposedly pretty decent for an add-a-leaf.