I agree. Ordering off the Web has a lot of risk attached to it. I'd advise against it for sure. Second, if your ordering all of that whether from someone you know or whatever. I hope it's not just to use all at once. That's a waste and it's abusive to yourself and the appropriation each drug effect deserves. The mix of them together is suicide. Your most seasoned users will tell you the same. You want to get high and continue getting high then you don't wanna die. Lol?
Seriously, I would drop the acid first, wait until I feel the body high and then pop the molly. Then drink a couple of bottles of water to intensify and hydrate. After I peak pop the Ritalin and come down with XANAX not oxys. That's my absolute best advice I can give bro