I am seeking Lemmy instances that federate with three specific instances but do not federate with one other specific instance. I prefer these instances to have more than 50 users to ensure a vibrant community but not be among the top 10 largest instances to avoid contributing to network centralization. Once I compile a list of instances meeting these criteria, I plan to assess their ping to identify the most responsive one.

Does anyone know of a website or an easy method to identify instances that meet these criteria?