My experience is start with one then add as needed. The ectacey acid combo is fun, a little crazy, but fun!!! I haven't done x in a couple years but about seven years ago I was into it pretty big, and did it on a regular basis for a while. It does'nt matter if its triple, double, single stacked, in capsule form, or dipped in acid or mescaline, half the time those two bit dealers don't even know what they're talking about. LegallyBlind is right the only good x is strickly MDMA. If the guy has a reputation of having good pills you'll be alright...Let us now how it goes.