I took a look at someone's pictures of their tires after a test session (request of a friend on their... 'kappa'

), their tire probe data, bump steer measurements at their race shop, and where they were setup. This was a test session at a road course, so your actual settings may vary for autoX...
In the end, I recommended they try -2.1 front camber, -1.5 or -1.75 rear camber, .10 toe in front, 0 toe rear, front caster as high as they could get it and even, and rear caster -4.5 or -5.0 if they could get it there (they borrow the rear caster gage from their local pontiac dealership).
"parking lot checks" so far have been favorable. Local track data to follow, but they did ask I not disclose their race team name or their state/location....
The kappa seems to wear heavy on the front outside tires, more than the rear.
FWIW,HTH.