To make a long story short, I have been trying multiple spring rates with my AST and previously FA suspension. I finally found something that works well for me. I have springs that I would like to have someone make good use for them.

All prices are for 1 pair of springs

Swift Springs
Z60-203-050 (2 pairs) 90 shipped
Z60-178-070 (1 pair) 90 shipped
Fortune Auto 500 6 kg/mm (1 pair) 70 shipped
Hypercoil 188B0350 (1 pair) 90 shipped