passionflower is a very mild maoi but some people claim it enhances visuals. not really gonna work for ayahuasca. also a lot of people say that moclobemide and related maoi's don't have an effect nearly as much as some of the natural ones seem to. it's been speculated that maybe it's not the maoi, but another property of these plants, or maybe a combination of maoi and something else.
Edit: also, your neurochemistry seems to have a significant impact on how much an MAOI will affect the trip as well.
Moclobemide works fine with DMT and has an explosive effect with mushrooms changing the entire trip into an oral DMT trip but that's undestandable because psilocybin has DMT in the structure. I just wonder how an MAOI could work on an LSD molecule to change it's effects. As far as I know there's nothing else in the LSD molecule it could enhance or bring out.