1) I heard MDA requires a higher dose to take effect. Is this true?
Its difficult to answer this question but the more important issue is MDA is quite trippy and strong so people tend to take a smaller dose than MDMA. I would advise 50mG and work up. Some will disagree with this I am sure. many pills in the 90s had these kind of doses and they worked fine dont be fooled by trying to stack everything up against defqons bombs etc all at 200mG+ as these doses in my opinion are not good or safe reference measures.
The exact dose required for MDA or MDMA to take effect I dont know. At a guess I would say about 30mG for MDMA and possibley 20mG for MDA.
In order to answer these questions with accuracy it requires clinical trials on multiple people. Unfortunately because we are talking an illicit drug rarely trials like this are carried out.
PIHKAL is quite a good source for dosing and effect type analysis for both MDA and MDMA. I often use this source for my own debating discussions but as pointed out this is still only the opinion of one person. An intelligent person yes but also an older person so you can only seek multiple opinions and draw your own conclusions.
2) Does MDMA relax you as opposed to make you want to dance?
From my own experience this depends on a few things.
a - Dose
b - Crystal or Pills (Crystal in majority of cases I have found more mellow)
c - Environment & Social Setting
d - Adulterants (often in pills but can sometimes be in MDMA crystal)
3) I've read on this forum that Piracetam preload is recommended. I've also read that it should be 2 hours before rolling by some and 7 hours of before by others. Some have said that I'd you take it too early. It can negatively affect your roll!
This has very mixed views. I would say its a 50/50 thing. Some report success others report it kind of neutralises the roll. I cannot speak from personal experience as I have never tried it so you will likely have to experiment.
Personally I would focus more on a lot of exercise, supps and general good health prior to rolling. 5HTP or Ltryptophan can also help pre load. Check out this link for more info.
http://www.rollinballzcrew.com/preload.shtml
Just go easy with MDA if you have never taken it before. I find it very different to MDMA. If you get the dose of MDA too high it can be quite unpleasant.