I have previously been critical of Effective Altruism, comparing it to trying to be an Effective CooperateBot (example).
If we were to extend Effective CooperateBot to the other sorts of players in prisoner's dilemmas, by analogy we'd call egoists Effective FairBot / Effective PrudentBot, depending on how your brand of egoism deals with CooperateBots.
That's a mouthfull and might be too technical, but it might be a nice way of reframing the question; when you said 'egoism,' I didn't know exactly what you meant.
Aka, coming up with a better term for applying LW-style rationality techniques to 'rational self-interest'.
Aka, in parallel with the current movement of 'Effective Altruism', which seeks the best available ways to fulfill one's values, when those values focus roughly on improving the well-being and reducing the suffering of people in general, seeking the best available ways to fulfill one's values, when those values focus roughly on improving the well-being and reducing the suffering of oneself.
(I find that I may have use for this term both in reality and in my NaNoWriMo attempt.)