I would try the one that meets your issue as to why you flare. I did fecal transplantation because I had been taking antibiotics for way too long. If you have any reason to believe that you may lack strains of fecal flora, then I would suggest trying fecal transplantation. I don't know enough about
the other alternative treatments to recommend those.
Colitis is in remission. No longer get IBS.
Figuring out how to reduce a flare or get into remission is a trial and error experience. Don't expect your GI to have all the answers. He was trained in making diagnoses, prescribing medications, and surgically removing the colon. He was not trained in alternative treatments. That's why they are called alternative treatments.
What works for me: Fecal transplantation, Probiotics, Anti-inflammatory foods, No HFCS, No crystalline fructose, No foods high in fructose, No artificial sweeteners, No pro-inflammatory foods when flaring, vitamins & supplements, Lexapro (for stress).