Elektrobuggy -
I run on a very slippery clay hard-packed track all the time in the US. Try my setup for starters, it makes awesome traction but might not steer enough for some. If there are lots of jumps, try smaller hole pistons, I recently ran 56/30 wt front with 57/22.5 rear and the car was more settled over jumps and bumps.
http://www.2wdrc.com/pdfs/Setup-2009...owBiteLosi.pdf