Micron 66 is a proven multi-season anti-fouling. If you are going to stay in for extended periods of time, you need to consider applying a couple of extra coats over the standard 2 coats, plus additional 'stripe' coats on the water line and leading/trailing edges of the foils.
Since you are blasting, I would recommend using an initial flag coat of a different color than the top coats of anti-fouling to signal when it's time to paint again.
Agree almost entirely, but in my experience, the most build up with ablative paints is at the waterline, or at least the upper edge, where the bottom coat is visible. But definitely add extra coats to any leading edge. I use Bottomkote ACT, since I sail in both fresh and saltwater, but Micron 66 is the tops. Just note Micron 66 is salt water only.