Well if a not big dose of mdma is increasing your DA activity slightly, then there's no doubt some bud would really intensify that. Bud increases DAs transportation I think(and releases some too I believe). Also, I believe bud has some effect on SR too, also probably potentiating MDMAs rolling SR effects. But I doubt you'll get much more of a detailed answer than that, we may not know why exactly, but it is known that for many people some bud really intensifies a weak roll. I don't smoke a lot when I'm rolling hard, but practically always run into people (friends or random ass people haha) that smoke me out, and a few passes of a blunt sure makes me feel even warmer. I like waiting till a few hours into a roll to smoke, as I enjoy feeling each drug I do while rolling's effect one at a time (usually dirty pills (mdma with just a little tweak)), then some drinking as they kick in, some smoking a few hours later, maby some opiate later on especially if I don't want to be bug eyed... Mmmmm good rare day like that.
I always think a light roll is very subtle, and mixing much anything good with it(except opiates near the beginning), often intensifies it a lot. That being said, if I roll I usually roll hard, knowing I have dank pills ahead of time.
