Where are you racing it?
My dedicated track Lancer runs -2.5 camber at the front, -1.5 at the rear, and a bit of toe out all round.
I found that too much castor didn't help, and only an extra degree or so did best.
I do plan on running more camber at the front though.
I had 205/50/15 Nankang AR1 tyres which I didn't like too much, went 225/45/15 Nitto NT01 tyres and these are way way better