First of all, congrats on your successful extraction! How much input plant matter did you use to get these crystals?
Second of all, please do not consume any of your product before you've obtained a milligram scale. A dekagram scale leaves too much margin for error, considering the experiential difference between correctly vaporizing 30mg and 100mg is night and day, and for someone with no experience in the kind of intensity that DMT offers, I would strongly discourage taking that risk and would recommend you exercise patience until your milligram calibration weights arrive.
In terms of enhanced leaf, I don't know how well mint works, I've heard it can irritate some people's lungs. Most people opt for mullein as a neutral base. Two pretty good topics to start your research from would be
A Guide to DMT Enhanced Leaf (Changa) and
Enhanced Leaf Vaporization Temperature.
Regarding your second plan, I was under the assumption you're extracting DMT in its freebase form? If so, snorting it won't do much for you, because you'd need the fumarate form for that. Plenty of info on the forum about that -
"dmt fumarate" search results.
Considering you're measuring using weights, I'm assuming you have some kind of fancy balancing scale. If that's the case, would be really cool if you shared a pic of it. I'd like to see what you're working with, because measuring one's doses is of incalculable importance IMO.
Cheers!