I went from 45mg's down to 9. Wasn't made possible with low powered devices though, not for me anyway. Just started using high powered devices which create more vapour. More vapour produced means having to lower nicotine percentage. May sound like i'm still using the same amount of nicotine but the clouds produced aren't to scale, if you understand what i mean. So yeah !, i'm using a lot less nicotine. When i feel the need for more, i just switch my high powered mod for a low powered mod with a Kayfun V4 or Russian 91% with 24mg's for five minutes.
It's the kind of thing i suspect some people do with their ego type setups. I have no doubts some people that vape with these are still smoking tobacco. When the vapour aint working they just light up a cigarette. It's at that point where i break out my provari and Kayfun.