I would be interested to know. Because I am not aware of any clear bio-markers by which MG is stratified with regards to severity.

As far as I know the most accurate score for MG (which has its limitations) is the composite MG score. I am not aware of any bio-marker being included in it.

Further more, to the best of my knowledge most MG patients are not tested for more than the AchR antibody and occasionally also for MuSK. So, I think that there is very limited data regarding other antibodies and their clinical significance.