whats the benefit of a triple accreditated MBA over others such as only AMBA

For schools that have them, obviously a triple accreditation is a good sign. But don't ignore schools with single accreditation.

I've looked into this, and here's the thing: triple accreditation tends to be mostly a European and Asian phenomenon. This is because the accreditation organizations tend to have geographic focuses, even if they don't officially say so. Only like five US business schools are EQUIS-accredited, for example. And AMBA ignores the U.S. altogether. As a result, no U.S. based b schools are currently triple accredited.

Does that mean that the single-accredited (AACSB) Harvard, Stanford, and Wharton are automatically inferior to triple-accredited Rouen, Maastricht or the Universidad de los Andes? No.

So my point is, don't shun schools with only one of the three major accreditations, particularly if they are in the U.S.

For established schools in Europe and Asia, one can justifiably start to look more closely for double- or triple-accreditation, as those are regions where it is more common.

Good luck!