HERE HERE HERE
(but we LOVE our composite ASC in Aquarius, and IC in Taurus, and and.. sniff sniff - but if we keep those we have to entertain the idea that midpoint-signs might be more important than we ever believed before - btw I am talking with myself, hence the plural )
though I did notice how I have so many midpoints in Capricorn and Scorpio and nothing in Aries for example.
So what do we do?
But you are right of course, it is about the aspects in a composite chart, and frankly it is about the 4th harmonic aspects (conjunction, opposition, squre) and the major aspectconfigurations, which would result in another midpoint picture again.