I’ve linked above to a paper that attempts to establish what to rotational speed of the clusters should be based on MOND and it’s close enough to the observatio

I’ve linked above to a paper that attempts to establish what to rotational speed of the clusters should be based on MOND and it’s close enough to the observations that in isolation it still the case that the galaxy either has 1/400th of the dark matter density a normal galaxy would have vs we don’t need dark matter due to MOND.