More castor on the front is what you want on the front. It gives better turn in response and doesn't sacrifice the camber wear issue.
Stiffer rear sway bar, it improves cornering ability, stiffer springs increase road harshness.
Rear bracing improves cornering, go too stiff and the car will go into lift-off over-steer.
I ran 1 deg neg camber total (front) and +2 deg castor over stock. cornering ability improved out of sight and reduced daily driven tyre wear.