I am so sorry to hear about your condition. I've had it for at least 12 years, and fortunately have had only two major episodes, but many times with more minor episodes.
Your are very fortunate to have seen Dr. Greipp. There is a major study being done at the NIH. I did not qualify, but hopefully, they will find something to help all of us.
I saw a Dr. In Philadelphia, PA two weeks ago. It was the first time I've seen a Dr. who has actually had another patient with SCLS. Please hang in there, and been an advocate for yourself. Keep trying to get answers. I am not a medical person, so have no medical advice. Maybe someone else can help you. Prednisone has helped me, but unfortunately you did not have good experience with that.
Good luck to you, I will keep you in my thoughts and prayers. It is so frustrating to have something so rare.
Eileen