Peculiar story I have here…
A few years ago I had a fellow out of NY keep calling in and calling in over the period of a few weeks, ordering beta nol. Each order was bigger than the next, to where we all scratched our heads and befuddlement and asked him if he wanted to set up a commercial account for reselling.
Turns out, he was using giant megadoses of beta nol to achieve otherworldly meta states during meditation. We’re talking doses high enough to make even megadose heavy hitters like tacitus balk! (If I remember correctly we stuffed a gram or so of bnol into half an ounce and he whiffed it straight from the bottle.)
Other things that immediately come to mind for deep mediative/soul probing effects are definitely TAF and possibly MEO to lesser extent. I know there HAS to be a putative in our bench that causes some soul searching and deep meta states, but I don’t know which one it is because I keep unscientifically taking a noseful of ALL of them at once.
TAF is an extreme intensifier. Kind of dangerous when I’m already feeling upset, because it will take that feeling over the top. If I’m feeling methodical or focused in any way, it will amplify it so high that I’ll be blown away like Marty McFly in the opening sequence of Back to the Future. 
There’s probably something I’m forgetting here because it’s L A T E, but I’ll check back in when I have other stuff to report. 