Jamie, sounds like you may be a tad over geared, I have no problem with my X11 7.5. What motor/gearing/battery are you running?
On a high grip track I would use the middle hole on the rear wishbone, 30 weight oil in rear, a rear roll bar and e speed hangers upwards, this oought to help.
Something you need to do is run the ride height a lot higher than you would think, the X-6 doesn't grip roll like other 2wd's and the car runs much better with the driveshafts slightly above level.
Throw out of your head all the conventional B4 setups and start calculating "the new math"