Officially .. if you need more grip.. use softer springs and lighter oil...
A stiffer chassis makes those adjustmente more effective. A softer more twisty chassis make the real adjustments useless... Did Nissan make a softer chassis for thr GTR.. or Chevrolet make a Softer chassis for the ZR1 .. No they didnt! Make the adjustments where they are most suited , not by compromizing the chassis.