DXM + amphetamine is very dangerous. I would quit that habit immediately. If it were safe I'd do it all the time too because it would be a MDMA-like experience in many ways.
Personally, my favorite party drug is a new combo I'm coming up with that includes kratom, mushrooms, cannabis and a light stimulant like yerba mate or gingseng. All natural, all safe, non-addictive and more fun than MDMA in my opinion.
MDMA is obviously the perfect party drug, however the neuro-toxicity of it, and also the unknown cuts, where it was cooked, purity, overall health risk, etc...way too much of a guessing game and way too unhealthy for me to use as often as I party.

This kratom+mushrooms combo is turning out to be a similar but BETTER experience than the MDA I was getting a while ago. If I could just get my hands on some poppy pods, I would add that to this mix and probably never, ever touch a synthetic party drug again.
If you haven't figured it out by now, the safety of the drugs I'm taking weigh heavily on the experience I have.