Keep at it Ridzky.
I've been shaving for a little over a month and have gotten a pretty solid routine and am down to under 10 minutes. I do shave AGT, from the front to the top of the head first and then from the neck up to the top of the head. I take fairly long strokes and rinse often. A few areas need a couple of extra passes, mainly the sides of the head, but I end up with a smooth skull with no irritation. Btw, I shave the skull every other day.
I'm curious, why the Mach 3 over the Fusion? I started out with a Mach 3 and accidentally used my Fusion Proglide one day and have been stuck on that ever since. The Proglide gave me a smoother shave and I like the 6th blade to shave around the ears and my sideburns.