SierraH3 aren’t you still running on 33" wheels with A/T tread? I have some slightly set of BFG 305/70R16 KM2 I'll make you a good deal on. 35"s and a more aggressive tread would help and maybe a front locker so you can creep more. The biggest thing is you want to avoid spinning your wheels. The static coefficient of friction is always higher than the kinetic coefficient of friction and the kinetic coefficient is independent of speed. So you get the most traction before your wheels break loose than when they are spinning and spinning fast is no better than spinning slow. Spinning fast is much better for breaking parts! Once the wheels break loose, the best option is to let off the gas until they stop spinning and them increase slowly.