I still prefer "had had had had" though: "All the faith that he had had had had no effect in the outcome of his life"

It's also nonsensical in content: "things from a place, which have things done by the same things from a place, themselves do things to the same things from a place" - it's tautological.

The "had had" example is much more relevant to someone learning English. Often when I construct a sentence with "had had", I question whether it looks right and if I can rephrase it.

You probably wouldn't use four had's in that particular example though - "All the faith that he had, had had no effect..." or "All the faith that he had had, had no effect...".

English is my secondary language. Compared to the other languages I know or have tried to learn, it's pretty easy.