Switch those skids out for skid frames and UHMW Poly sheet skids. I have huge (frame rail to frame rail) 3/8" skids under my truck and they weigh hardly anything compared to steel equivalents.
Change to narrower tires, aluminum tub, plexiglass for windshield, etc.
I agree with an above post I do not think your TJ weighs as much as you think. The rear axle, tires, and suspension links weigh incrementally a bit more than stock but other than beefy skids and the winch it does not sound like you have added much dead weight. When I look up specs on a 2000 TJ I see weights in the 3300# range for the 4.0 manual. No way you have added half a ton to it with what you bolted on.
Get it on a truck scale and report back.
