Ahhh, the stupid slick dusty, we sure hope it grooves in 3 rounds of qualifying dirt.
I hate that stuff. Nothing really works. Just grab a compound that kinda works and a pattern that will last the day. Those dusty tracks really hurt my eyes towards the end of race day.
Aka Enduros (S), Ibeams (s). Gridirons (M) if they give in and choose to actually water the track. Gridirons (s) if the track stays wet.
Hard Aka's don't really work anywhere. Medium seems ok.