I haven't head of anyone making this combo yet, but I bet it will be a pretty epic combo, could have some intense synergy. Tread lightly with this one, because it's pretty unexplored. I would go really light on both, 100µg max for the ETH-LAD and 100mg max MDMA. If it were me I'd probably go 75µg ETH-LAD and 60mg MDMA. For timing I'd probably take the MDMA about 1-1.5h after the ETH-LAD.
Def report back in if you do it.