After 1-2 years running a steel stubby bumper, no winch, my springs were sagging 1-2 inches, basically negating my Teraflex leveling kit. With a heavy bumper, I'd look at either the Rancho 2" lift or EVO MFG leveling kit which replaces the front coils, or the the Teraflex Performance Leveling Kit which replaces all the coils. Replaced my stock front coils with only the Rancho 2" coils and took out one 1" spacer. With a 8k winch with steel cable, I have minor rake. I'm probably going to put back in the 1" spacer to get rid of it.
First, take a 50/50 water/alcohol solution and douche all the sand out of your vagina. Seriously, you gotta get that nozzle ALL the way to the cervix since it sounds as though your vajayjay is completely blocked with a silica compound.