The No embouchoure embouchure is only missing the top teeth as an anchor point for the sax.
The lip does work fine to form a seal without the aid of the teeth, just takes a bit more building up the muscles.
It does not really matter where you are on top of the mpc.
What counts is what happens below the mpc, where the reed is, and that the air goes through the mpc, not past it.
About the squeaks:
I had one box of reeds that have been a tiny bit broader than the ones earlier and later from other boxes.
They had a bad tendency to squeak as they got squished a bit from the sides.