well, all things aside, first would try the "Stock" RC8Be set up and go up or down from there...it's a pretty good baseline set up!
but if you have "Already dont that"
try the "Stock" set up except change out the front sway bars for both front and rear are "Gold" and put rear hubs in "Top" hole
or lowering the hub.....
another thing to try is Brent Thielke's set up for High traction track settings....it seems like when one looks at it like Whaa???
but it "Works" with the stock pistons 1.3x6 is middle of the road feels pretty good...with 1.1x10 feels better with better "Pack"
and with the New 1.3x8 Angled drilled Tapper pistons,it's like "Velcro"