Here is my setup from Kiddy.

Clearly i've not done much testing with the car yet, but this seemed to be a really good starting point from which i will work from.

Front
Oil: 37.5 Losi
Piston: Associated 2 Piston
Spring: Big Bore Losi Green
Shock Position:
Inside on the wishbone
Second hole on the tower
Camber Link:
Inside on the tower
Shortest link on the Hub
2mm under the bump steer washer position
Brass bulkhead

Rear
Oil: 30 Losi
Piston: Associated 1 Piston
Spring: Big Bore Losi Pink
Shock Position:
Inside on wishbone
Middle on tower
Camber Link:
Second from top on the longest (inside) hole
Middle on the standard 0 degree rear hubs (turned around the make the camber link a bit straighter)
Short Wheelbase
4 degree's antisquat
3.5 degree's toe in

Motor: Tekin 7.5
Speedo: Tekin RS Pro / ESC setup (RS file)
Gearing: 26/81

What tyres did you try and run?
If ballistics did you run 2wd fronts or 4wd?

I was using yellow rears when it was dry with slim staggers on the front.
As soon as it got wet i put on green ballistics, 2wd fronts.
No rows off any of the tyres.