I would put 3 in the rear diff, I would also go a little heavier in the middle like 5 or 6, lighter springs, and go to a lighter sway bar. You can also drill the new camber position in the rear shock tower and move the link to the inside hole on the hub.
Then again, if you just started racing off-road all I would do is change the rear diff fluid and race the car for a couple weeks before I toughed anything else.
Good tires can make all the difference in the world in the traction department.