You make the case that local philanthropy is better than global philanthropy on an individual basis, and if you are correct (which I don't think you are) then EEV would choose to engage in local philanthropy.

Note that in the link that you're referring to I argue both for and against local philanthropy as opposed to global philanthropy. Anyway, I wasn't referencing the post as a whole, I was referencing the point about the "act locally" heuristic solving a coordination problem that naive EEV fails to solve. It's not clear that it's humanly possible (or desirable) to derive that that heuristic from first principles. Rather than trying to replace naive EEV with sophisticated EEV; one might be better off with scraping exclusive use of EEV altogether.