I'm fairly new to 12th myself so if anyone else wants to jump in with anything more please do....

But i'd say your aiming for about 4.5mm ride height at the front and alittle more at the rear maybe 5mm

Run alittle toe out or 0 deg. talking maybe 1 deg if you want it

1.5 to 2 deg camber

After that ask for help from the locals ... they very rarely bite

But sounding like the back is possibly to soft