I believe PCT should start a few days after the last pin. Why wait until you're suppressed? You then have to fight your way back up. Get your body on the mend as soon as possible. And use something to make your own testosterone production as bioavailable as possible. That's why you should use UNLEASHED.
Also, check out BRIDGE for extending the productivity of your cycle naturally. Osterine can be used for a couple of weeks post cycle but it will delay recovery, so keep that in mind.