I mean, if you really want to up your esports or competitive go/chess games, just stick to Adderal/Ritalin/caffeine in moderation. It has already become widespread in academia, with the same improvements to focus, without the delay in reaction times. You also don't need to rely on three subjects self-reporting results on vice for the data. (Note, I do not play esports but got through my undergrad through rigorous use of coffee/nicotine to ease with tests/assignments, to the point where i still quote the line about mathematicians are machines that convert coffee into theorems).