Lowering and geo question

[pothole]

So, I understand there are limitations with the stock suspension arms that lead to problems when lowering and achieving desired geo settings. I may well be going with RoW M030 and H&R springs and would like to know what I'm looking at.

From what I've read it's toe and camber that's the issue - adjusting one effects the other. But in what direction?

How does the conflict work? Let's say, as an example, I want as much neg camber as possible. Would this mean lots of unwanted toe? Thanks.