Hi Dan,
Sorry to hear what all you are going through. Were you taking prednisone when you went into crises?
That caused me to go I to crises last year.
I noticed that you are also on thyroid meds. Every time I have had any type of crises and had to be hospitalized, my thyroid levels were out of whack, either high or low, so you may want to consider that.
Have they tested you for LEMS (Lambert Eaton Myasthenic Syndrome)? It presents very similar to MG, but has a few other treatment options.

I was told I had MG and was later diagnosed with Lems.