I raced on a track a few months ago here in the US where the dirt was kind of similar to that track; it was dry and hard packed with low jumps. This is the setup I ran BUT I ran Losi 42.5wt in the rear instead of 45wt I had on the sheet. I thought it was very easy to drive this setup fast.
http://i291.photobucket.com/albums/l...nalextreme.jpg
Then this second setup used to be my old standard setup. Both setups work very well, the above one is smoother on entry due to the thicker front and rear oil and since is has short camber links and less toe it is also better in the bumps.
http://i291.photobucket.com/albums/l...RWCsetup-1.jpg
I can't find a setup from his car but Jerome Aigoin used to have great setups for his WC on european tracks.
Of the two setups above I think I would recommend the top one first.
If your car is traction rolling bad, the first thing I would do is lower the ride height a few mm. Then go thicker oil in the shocks. You might want to go thick oil like in my second setup, I always thought that helped me out. Oh, you can also try less camber, that will make a huge difference; if you are at -2, go down to -1 etc.
Hope that helps.