I saw that video. That’s how I learned the phase trick and where to place the mics. He doesn’t really go into much detail on how he chooses to blend the two with the faders.
Oops..sorry my friend..
I did not not watch the vid,I just remembered that it exists and posted it.
In any case..
It is all "down to taste" I guess. There is no general rule how to mix two mics. I am sorry. It is all about this silly "when it sounds good it is good " kind of thing. It all depends on what you want to achieve and the gear you have.