Here are the setups we used at the Wodonga track last weekend. This track is really bumpy but the red clay has pretty good grip making setup a challenge!!
B74: I highly recommend the Bezerk RC front tower with half hole shorter front link, much smoother steering in bumpy corners. We switched to a softer rear spring and firmer rear bar and slightly heavier front oil.
B6.1D: Gull arms and more droop helped in the bumps, as did 1.8mm rear pistons and less rear toe in.
JConcepts Sprinters tyres were awesome on the wet track, Ellipses working best in the finals.
When running on bumpy tracks, always add some camber front and rear to help smooth the car out in the corners.