I've found that the best way for me to step down was to take it at abut -2mg's at a time, and every time I have stepped down I have chain vaped hard, but I figured it was OK because I was stepping it down so chain vaping was totally OK and has worked. Then once I'm OK with the MG that I stepped down too, I would slow down a bit. Don't get me wrong I still vape my Azz off but as for stepping down that system worked great for me. !!
I have been making my own black liquorish for a long time, it does have a very good TH, however I vaped so much of it I had to stop using it. Once in a great while I will break a little bit out and hit it for a bit.