If your goal is cutting, and you have experience with these compounds, I would consider adding the masteron. If these compounds are new to you, I'd hold off, as sust and tren alone will do a hell of a lot. For a new user, adding mast wont make much of a difference. Then after the cycle, you could come off, do your PCT and you'd still have an extire cycle left, prop and mast. Add in your GH and you will be golden!