What I would focus is probiotics. The one that worked really good for me long term was HMF neuro which is the only one with human derived strains on the market in the US. If you rotate probiotics then you get a variety of strains. Additionally, some such as S. boulardii (a type of yeast), consumes candida and works really well too. The probiotics are much more likely to cure you than antifungals.
I’ve had problems with FOS and anything with Inulin in it.
The S Boulardii sounds like it might help if I take enough of it long term.