I think this is pretty much uncharted territory. From what I've heard, dmt isn't soluble though in PG for it to be an effective solvent, so I'm also wondering how well terpenes would work. I believe the solubility would have to be somewhere near 1 gram per mL. If dmt isn't soluble enough in the myrcene, maybe try d-limonene?
"There are no differences but differences of degree between different degrees of difference and no difference."
-William James, under the effects of nitrous oxide