I don't think some countries have very good IQ or PISA results. I have confidence in Vietnam.
And politically Singapore has a much stronger presence on the international stage.
Indonesia did well on math Olympiad but the high results were won by Chinese from Indonesia. Though it's hard to prove because they were forced to use Indonesian surname
An acquaintance of mine employs two maids in hk actually so that's how i got to know a thing or two. Indonesians make up a large proportion of the working maids there after the Pinoys. It was quite a revelation to me after i found out how she compared her own country with India. As for ASEAN education i believe S'pore can easily make it to the top list without question.
Do you have an Indonesian or Filipino maid?