Just to add a perspective here, when I've tried low dose MDMA (40 mg) at a festival it had a stimulant effect but left me mostly feeling uncomfortable and irritable. I had a grim evening and went home early.
The MAPS study team found similar problems with low doses. Initially they tried using low dose MDMA as a control arm compared to standard dosing. But they found that patients on the low dose did substantially worse than patients who took nothing. At the time their conclusion was that low doses were activating but not pro-social.
That said, clearly many people here have had good experiences. I have a close friend who says that 30 mg is her ideal dose. So it's probably worth trying low doses to see how you do.