I have little experience or knowledge about piracetam and its effects on MDMA, but I will say that taking it on a daily basis of 1.5g twice daily along with a choline supplement and maybe some Huperzine A (I take 1 200ug pill per day) has helped my level of brain function. Im a lot more active, alert, and way less spacy. In the end, I reccomend taking it for reasons other than rolling, in a lot of ways these substances make their influences known after days-weeks instead of hours.
This combination might cause a head change, but if you throw enough nootropics at your brain, it is most definitely noticeable. For supplements, some pack a hell of a punch.
Give it a shot if you have piracetam, the addition of choline and Huperzine A increases its action.