In answer to your questions...
I was at my worst 19 years ago and that is when I had the resperator, I was taking 60 mg of mestinon every 3 hours.
I am rare that I went into a complete drug free remission for many years but last year my MG has returned. I only take mestinon {60mg every 4 hours} or as needed. I don't take any other medications due to the fact I am overly sensitive to medication, I even take benadryl with the mestinon.
My double vision is still pretty bad even with the mestinon but at least I am not choking on food

Rest is the only true way for me to control my MG.