I picked 40mg to 50mg. My doseage has changed a lot in the 8 or so monthes i've been useing DMT. When I first started, I wouldn't break through, even at 100mg. Just have the fractals, vivid colours, and crazy thoughts. After a coulple months of sporadic use, I had my first breakthrough, at about 60mg. Wow. After that my common dose was about 60mg, and if I had correct set and setting, would result in a breakthrough every time.
A couple more months go by, and I notice that 40mg can sometimes absolutely roll me. Still, I guess my average dose is about 50mg, sometimes 60mg. Highest I've ever gone was 180mg, and it was overwhelming. Hard to describe, but I guess it was like being a computer, and haveing the reset button pushed every half second or so. For 20 minutes. It was difficult to pull myself back together after that one.
As for Jungle spice, i've only ever done a xylene pull on an already exhusted batch. Had it maybe 10 times, and still forming an opinion on it. I normally have 30mg of DMT with 30mg of Jungle. In my experiace with Jungle, it does not vaporise anywhere near as well as DMT, and leaves lot more residue behind. I can normally take 50mg in 1 or 2 hits, but with jungle, it is a lot harder, because it just doesn't want to vape for me. Tales at least 4 hits to get it all in, and by then the DMT is almost at full effect. I am useing a jet lighter, with a glass powder pipe.