There’s no reason for you to even bother at this age. You’re still developing and likely have plenty of your own juice inside already. Besides, Winstrol is rarely used as a stand-alone compound. Trust us, we’re not trying to be hard on you. Take another few years, and when you decide the time is right (you’ll decide on this regardless of what anyone advises), use just testosterone. Right now is not the time though. Don’t screw up your natural test levels while your body is still trying to develop.