I certify that even after feeding it extensive samples of my writing and iteratively arriving at a description of my writing style, what it outputs still sounds like AI.

I'm also 100% convinced that what you're trying to achieve cannot be achieved by prompting directly for it.

If I were to guess, you'd have to elicit moves towards your personal semantic field indirectly (second order effect of the prompt else it will just sound like it's trying to imitate you) + introduce random errors (from an outside process, not "make it more random" as a prompt). Else, you'll always get synthetic diamond, and you can always tell.