"Even the smallest cup of coffee, cacao and any other stimulant makes my candida symptoms much, much worse for couple of hours (even when i take lots of strong antifungals - my main in nystatin).
Stimulants, which increases cortisol, also suppresses my immune function even more."
Looks like you answered your own question.
Eliminate foods and drinks directly responsible for causing harm, and allow your own body do cure itself.
Have you started flushing your liver?
It is the job of the liver to handle all chemicals absorbed into bloodstream by portal vein.
If you can't tolerate foods and drinks, look at your liver, and your intestines.
Until you heal your liver, you will not be able to tolerate foods you are intolerant of today.