I use dex for this purpose, usually 10 mg (but 5-15 depending on how I feel). More than 15 seems to just add to the side effects for me, without giving extra energy. This dosage doesn't make the positvie effects from MDMA feel different, I'm just able to move and doesn't fall asleep.
It does NOT lead to compulsive redosing and it's not enough to get high from on it's own... Such a low dose will not give you an amphetamine crash either... I use low dose amp with MDMA every time I roll, because pure MDMA (tested with multiple tests, excellent source, none of my friends get tiered from the same product) makes me extremely sleepy. Some people get sleepy from MDMA, that's just the way it is, even though some people deny it...
I would start with 10 mg (with the initial drop), and if that isn't enough take 5 more. I think there's a good chance that 20 mg adderall would be too much, if the goal just is to "wake up" so that you're able to enjoy the MDMA
I'm going to try Noopept and Aniracetam with MDMA, I can update here when I've tried it out. Some people experience that the combination gives more energy, and it's safer than combining with amps