This is the guiding principles that we have derived from our experiments with 26 different configurations and millions of generated images, combined with my own experience.
It is in the official LyCORIS repository but currently hidden in the document branch
https://github.com/KohakuBlueleaf/LyCORIS/blob/document/docs/Guidelines.md
Since I am not sure how much time it will take before it appears on the main branch, I take the liberty to post an article here for better visibility. Discussions are welcome.