Could this be a potential admixture for changa? Apparently it does have quite high levels of harmala alkaloids owing to it's entheogenic use and as an ingredient in ayahuasca. It would be interesting to try depositing some dmt on some rustica leaf and seeing what the effects are. Only problem I can see is it's also very potent in nicotine so it'd have to be in small amounts but the maoi's might not be strong enough then.
I forgot to add the part about lemon, sorry about that. In my experience, however, it is not really necessary, as long as you make sure the water is kept hot. Doesn't hurt to acidify it though...