Advice for strengthening/improving one's autoimmune system?

I have a serious condition that isn’t contagious; it’s caused by an autoimmune problem. My body’s attacking and damaging its own tissues. Currently, I’m treating my disorder with a highly-potent topical steroid. I don’t like doing this (although doing so is making life tolerable) and would prefer a holistic approach.

I’m aware that the autoimmune system isn’t one thing but, well, a system of defenses. Aside from the obvious approaches—eating a nutrition-packed diet, avoiding alcohol, exercising, and getting plenty of sleep—does anyone have advice?

Please don’t respond with “U R a idiott,” or something equally profound. I’m really hoping that some members of the jelly community will have helpful knowledge.