As a sink shaver I too do the two mirror bit. Though since I must have coarse hair or something I have found that I tend to shave by the sound of the blades on the hair. When there is no sound then I am smooth and slick
Fog-less mirror is an oxymoron. I've tried 2 or 3 and they always get foggy after a few months or so after the coating wears off
I'm trying to become a 'shower shaver' but after a lifetime of shaving at the sink it's a daunting process. I'm going to get a shower (no fog) mirror and try it out. The ideal is to do it by feel, but I still have a long way to go on getting that method perfected.
I don't use a mirror. I listen to Yoda and use the force.