on the front I prefer flat or reverse on the back you just have to play with it until you find what the car wants you have to be cautious on front to rear stagger because you can dewedge the chassis and get your corner weights off and make the car a handfull
Front stagger does nothing but change crossweight just a bit. A lot of people run as Willy said pretty close to no stagger up front to put more weight on the lf tire. The same thing can be done with adjusting the shocks. Rear stagger obviously makes a huge difference, That is because the two rear tires are connected, where the fronts are not.