I think its good to try and think out of the box, try innovation, but in this particular case I don't think it would work.
First of all, the water present would limit the temperature as the water boils to 100c, which is less than the vaporization temperature of DMT, specially in any salt form. Once the water is completely evaporated (and all the energy/time it would take) you'd be left with your DMT salts + impurities, which would be hard to measure to dose because you don't know what impurities and how much DMT is there in the first place. And if you'd heat that up to try and distill it, its very likely you'd get some degradation of DMT in salt form. If you want to distill your DMT, you'd want to have it in the freebase form. Plus you dont know the boiling point of the unknown impurities, if they might co-distill with DMT.
Also, another problem is the suggestion to use Phalaris, which is an extremely unreliable plant for DMT. Firstly because yields may be extremely small (most times), and secondly, because you never know what variety of other (possibly unwanted/toxic) alkaloids are there.
If you really want to insist in using Phalaris, I highly suggest checking
this out if you havent yet.