Combining 2 strong stims is rarely something spectacular and more likely an intro to a bad experience and/or bad comedown. Even combining stims might be less dangerous than combining multiple downers, AND I SAY MIGHT BE SO DON’T GET WILD, you are more likely to not get good synergy if not planed and dosed carefully. Not sure if you know it but some combos like MDMA + coke even block/ruin effects of each for many/most people.
I like amphs + MDMA (not always and it’s worth noting most people prefer pure MDMA). I also like a bit of ephedrine with most stims. I like tiny amount of caffeine with some. I like to keep my coke free of other stims. And I don’t have enough of experience with meth, let alone combos with it to contribute anything.
I mostly like stims + other stuff and not stims + more stims and feel like I’m def not the only one.