There all mixable just certain things to know by mixing estrogen levels what to take to control them past treatment after your done with cycle diet extra. Everything depends on what your trying to achieve. Size cut or just better performance. Everything has it's advantage and disadvantage and everyone is different. Basically you have to figure out what works best with you ask a individualYeah it's a good roid just haven't seen it run with deca or npp often. You might have. Your experience and knowledge makes me look like an infant. Always seen people go with one or the other