I have observed that at least one of the harmala citrates possibly appears to show slight solubility in butyl acetate so by analogy there may be a slight solubility of something like harmine acetate in vegetable oil - at least, I'd say that's where you might want to take a look.
It's presumably a reasonable guess that you'd use freebase DMT in oil so the harmala acetate would possibly be incompatible with that approach. But not necessarily, so if you're willing to do several experimental blends everyone will learn from your results.
βThere is a way of manipulating matter and energy so as to produce what modern scientists call 'a field of force'. The field acts on the observer and puts him in a privileged position vis-à-vis the universe. From this position he has access to the realities which are ordinarily hidden from us by time and space, matter and energy. This is what we call the Great Work."
β Jacques Bergier, quoting Fulcanelli