The only problem with MDMA is it is not legal in the majority of countries. Up to hundreds thousands (something less maybe, but still a lot) of people all over the world would gladly submit reports about their experiences of taking MDMA together with and without these substances (piracetam, magnesium, antioxidants etc) if this was not associated with risk of getting busted by the authorities. I have no doubt his advices would have been proven statistically then.