The problem is exactly what you have noticed, cannabis needs really high temperatures compared with the major part of the herbs. Just sage i think is good for a mix with cannabis, the rest is pretty impossible.
I really can't imagine how you didi with peppermint that has a so minor temp range!
It was really simple how i did it with peppermint: At this time i didn't know anything about the different boiling temperatures, i just experimented with stuff i found in the garden. The amount of mint in my mixtures was very low dosed, so to me it was quite enjoyable. I didn't observed any combustion (maybe i was just not realising it, because the amount of mint i used was so small).
The only thing i can suggest you is using a DaVinci IQ that has a separate chamber for the flavors.
In that second chamber temperatures are significantly lower than the first, so you can get some flavor without the risk of burning the herbs.
I'm just starting to use it in this way (always with tobacco) and seems it works pretty good. I just have to understand what is better for the flavor and for the ease of use, mixing herbs with tobacco or keep it separated in two chambers with my IQ.
I never had an eye on the Davinci IQ. Sounds interessting. Further investigation on my side is needed.
For my part, i am really happy that i stopped consuming tobacco and i am not interested to start again after a little bit more than 10 years of combusting it. Still i will use it for spiritual reasons from time to time.
Also i am looking forward to have some camomile in my garden next year. Just planted some seeds this autumn.
@galumar do you ever vape cannabis, or do you stick to tobacco and other plants?
Thanks for sharin, keep on vaping