Exactly how resource-intensitive would be a bunch of queries that got the editcount from every wiki that you find in toolserver.wiki (821 of them). Basically it'll be a PHP code, which cycles through all the rows in toolserver.wiki, then connects to each server/db in turn (Ill ORDER BY server so I don't have to connect-disconnect every time), and runs

 SELECT user_editcount,user_registration FROM mw_user WHERE user_name="foo";