UNLEASHED doesn't actually combat suppression -- nothing does. It makes the most of the existing testosterone you have. So if you're on cycle, you have more avaialbale T. And when you're off and suppressed, you have more unbound T as well, which prevents catabolism and maintains gains.
I'm sure how suppressive ICON is, but it wouldn;t be a bad idea to run UNLEASHED as well as a traditional PCT.