Unfortunately, I do not have a great answer for you and can only offer speculations. Perhaps someone with more knowledge on the subject can chime in.
From the perspective of someone in the United States, RIMAs are not readily available. Furthermore, many in the US fear RIMAs because of their...
Here are two papers with some potentially useful data on pharmahuasca dosaging that I had saved:
Pharmahuasca: Human Pharmacology of Oral DMT Plus Harmine
Jonathan Ott
https://doi.org/10.1080/02791072.1999.10471741
sci-hub link: https://sci-hub.st/https://doi.org/10.1080/02791072.1999.10471741...