I love the idea of an experiment like this. But I worry about the conclusions. I wonder why you want to do it. I suppose to draw some set of conclusions from the result. The potency will vary between individuals. In a true scientific study they deal with these variables. That is why Strassman, for DMT went to laboratory made DMT, so that the dosage would be the same for everyone...and I am not sure if he accounted for BMI etc.
I worry that after the experiment is over there is no way to actually have significant results. Science works very good for such studies. I think that it will be a highly suggestive outcome. People may WANT to feel better on them and then find it hard to be fair.
But if you wanna do it then you have to out out questionnaires first. U need to get details, like age, body weight, experience with shrooms and I do not think that people should be using any other substance at all when they join the experiment, because these things are serotonin affecting things. Who can say how a good DMT trip will interact with the low dosage of psilocybin.
It would be best if it was a double blind study

Maybe you should look up someplace first how to set up such a research. There must be a standardized method to copy that can be used or adapted where needed as to have a framework from which you can actually draw some meaningful conclusions about the results.
Hell, maybe you can mail that Johns Hopkins dude who studied psilocybin and ask if he wants to unofficially give some outline as to how to set things up.
The best thing would also be to have one batch of shrooms and then send all participants from that batch. But then it will not be anonymous again. Me I have Colombian, Cambodian and McKenaii in stock to do this for a decade

If you'd all live in .nl I'd send participants from my batches so you have a standard.
What I am curious about is if we could detect what McKenna was always on about. How shrooms suppress male dominator ego. Could it be that people doing this for a long time become less dominant, aggressive, more cooperative...etc.?