I just tried my panther clay slicks w/ ofna medium foam inserts. These are the $HITZ!!! IMPOSSIBLE to lose grip on dry asphalt. I've been in this hobby for 7 years and nothing I've seen comes close. Also they are the lightest tires you can buy at 44g per tire. I also have the soft compound of this tire, but it has less traction on dry asphalt.
Check out my custom converted 8ight:
Sub 7lb, lowest CG of any 1/8 buggy