You should use mullein instead, it absorbs a ton of DMT because it's so fluffy. I make it usually at 60% strength (DMT/(DMT + mullein)). If you want minty flavor, get some peppermint oil and put a few drops in the acetone.

I run mine at 200 or 205 usually, 210 would be the max (and only for very fresh leaf). You won't really get a burned flavor until 220+ though. Freshly enhanced leaf (< a few weeks old) will require a higher temperature to get the same vaporization, due to leftover moisture.

You may also need to increase the dose slightly more than usual, since not everything is vaporized the first go (usually around 85%). You can save the remains and throw them in your next extraction to recover the leftover DMT.

I use this method to consistently break through once the dose is figured out for a particular batch.