I haven't gotten to sliders yet. Metal tech sells sliders that are AHC compatible. I'd like to fab my own, but I may end up buying theirs cuz they are better than I can make and already laid out for tight spacing on the frame with AHC.
Your pressures are probably high. Just adding the winch I went from 7.0MPa to 8.8MPa. (Spec is ~6.9.) The bumper is heavy and hanging off the very front of the frame, which gives it some leverage to boot.
Somewhere around here are side by side pix of an AHC coil spring next to a non AHC spring. That picture speaks volumes.