RCs Best RC as study drug??

I don't care much for the stims, though coke has always been a favorite due to its euphoria. Seeing as how the ban on a lot of popular chems is coming real soon (a week or two?), i need to know and I need to know fast which of these stupid fuckers is actually worth a damn. 4MMC can cram it, I don't need more coke-y things, I'd just like to have a little attention-increasing chemicals at my side when necessary. 4FMA and 4MEC sounded worthy, but I'm really not sure, it's all an alphabet soup. Can anyone comment here on what they've experienced as far as pretty good research chemicals they've sampled which produced good stimulation that wasn't frantic, distracting, too physical or uncomfortable or outright euphoric? Your opinions are greatly appreciated, thank you.

Caffeine.

Read the rules - no drug reccomendations.