Taken from The Encyclopedia of Psychoactive Plants: LSA/Desmanthus Ayahuasca Although the report (in Entheogene 5 1995:40f) spoke of a quite pleasant experience, this micture appears to be potentially dangerous. 3g Peganum harmala 1 Argyreia nervosa seed 3-4g Desmanthus illinoensis root cortex I wouldn't try it.
I wouldn't try it, there's a lot of body effects from MGs like vasoconstriction that might get potentiated by the MAOIs. Given how generally unpleasant LSA experiences are I wouldn't imagine throwing in a potentiator would do much more than amplify the horrible body load and even give you serotonin syndrome.