It is extremely low in MAO inhibition when compared to Syrian rue or Caapi. You could smoke DMT mixed with passionflower or use it as an admixture in changa, as many already have, it's quite popular. Passionflower extract would be a better option for MAOI (oral), but still comparatively weak. I don't think passionflower has a very pronounced effect when smoked, but I've never tried it myself.
A gram of DMT can be added to various plant materials, either in a 1:1 ratio (strong changa) or less, it's up to you, changa is versatile, there are many quantities and 'recipes' you can try.
Also, i hope you don't mean vaporizing all that gram in 3 tokes?