It will most likely add a gentle weed high if you do it in this fashion. I'd recommend smoking just as the roll hits. Add some music via headphones or speakers and you'll be melting away.
Just a heads up, shit can feel fucking intense. REALLY fucking intense. You'll probably be asking yourself how it's possible to feel so good. If you're rolling hard enough you'll be totally lost in euphoria, wondering what the fuck is going on, incoherent, unable to move, with your jaw wide open in pure awe.
Anyway, yes, weed and mdma is the key to feeling like every single cell in your body is pumping out pure pleasure. Ahhhhh do I miss mdma. Apologies for going off on a tangent.