Loosening the shackle bolts a touch, maybe? Greasable shackle bolts might also help.
How long are your shackles? What do the spring to shackle angles look?
What is the air pressure in your tires? (My jeep is happiest @28psi)
Does it still have track bars? Throw those things in the garbage.
After that, you might look at softer shocks??
The springs may break in a bit, but mostly they're just gonna ride like they ride.