Does someone know what settings gives the best protection?

This is a general answer: you're waisting your time trying to protect your DVD. Law-abiding viewers will not copy your product, those who want to copy it anyway, have plenty of (even free) software on the internet to do so.

Copy protection included with DVDA doesn't work when burning dvd's from your pc.

Anything that plays can be copied.

If you don't want people to have the ability to copy your product, the only way to protect it is to lock it in a safe and never release it.