You got the plant sources mixed up.  Viridis contains the DMT and caapi vine contains the MAOI. Also the author claiming the LD50 of DMT in humans is 110mg (500 orally) is absolutly rediculous.  A dose of about 500mg would not kill an adult human.  There is not a single report of anyone ever dying from DMT intoxication and people have taken well over 1000mg orally.   Additionaly if anything the compound of danger in the combo are the MAOIs.  I find it strange he did not look at them.  However likewise individuals have taken large doses of harmine, harmaline, and THH without death.  Although higher doses would certainly.  I agree with his conclusions that this combo has little abuse potential and minimal negative health effects. 

Also it has been shown conclusively that there is no difference in levels of methylated tryptamines between psychotics and regular patients.  It seems these compounds play a role in normal nervous system physiology.  Your article was good. The last paragraph is very nice.  These compounds truly are tools which can be utilized to understand the neural processes which give rise to subjective experience.  The fact that two neurotransmitters are schedule I drugs shows something about the state of america and its views on scientific truth and advancement.  It is the scientific research which suffers and thus humanity as a whole suffers from such ignorance and paranoia.