I run 1.5 front and 2.0 rear with 615's. Looking at the tires, the fronts could use a touch more, going to 1.7 next alignment and the rears have a little to much, (never roll to the edge, wear the insides) and are being backed off to 1.8 or 1.7.

The adjustment are not set in stone, i may go up to R comps, then i'll leave the rear alone and just add more fromt camber.