My personal opinion is get it back to the unloaded weight. I do this with a tape measure. Springs have a loaded height and that changes as the load changes. I just measure it before and after.
No man has a good enough memory to be a successful liar. Abraham Lincoln
2016 36FBTS Pinnacle
2016 F350, 6.7, 4x4, DRW, long bed
B & W Companion 5th wheel Hitch