It's going to come down to how you want it to drive really.
I set up the suspension geometry on my mate Ken's Freestyle when he built it. He told me he wanted it to be tail happy, so I set it with 1.5deg neg camber at the front, which is quite a bit for a mid engined car, so it has really sharp turn in, and at the back I set zero camber and zero toe.
Now for me it's too tail happy - if you chuck it at a corner you have to catch the back end instantly. But he loves it like that and I have to say he really can make it dance too!
I'm going to set mine to be a bit more neutral, but hopefully still be able to provoke it into some arse end action when I want to.
So for that I'll probably go with maybe half to 1 degree of negative front camber, and zero or a smidge of negative camber at the back but with maybe 3mm toe in to make it a bit more stable at speed than Ken's!
Hope that helps