Too many variables, tyre specification, slip angles, sidewall structure etc, X negative camber might work well with one tyre and terrible with the next, let alone toe and castor settings.
Best bet is have a play about and decide for yourself, i ended up running just under 3 degrees negative, would i have run more had it been available? who knows, would i have run less? No, but they were my settings for my tyres and driving style.
If your asking what would be a reasonable starting point for a clio road car on road tyres for track use, then i'd start with around 2 degrees negative camber, stock toe and castor (the latter being un-adjustable on the stock clio, having said that so is the camber without the addition of different dampers or bolts) and go from there.