I had a class on this in high school. As we learned it there is always a dominant humor, and a minor humor, though the teacher described himself as choleric/choleric, and it was easy to see why. But maybe it's the sun and moon?
We had to choose our dominant and lesser humors and write an essay about it. I had the hardest time choosing and ultimately just made some stuff up.
My ASC is choleric, sun is melancholic (well THAT is for certain sure), moon is phlegmatic, Mercury is sanguine.