After 40+ years smoking, recent years smoking lights, I started with an array of juices from 11 to 26mg. Using a little (very little) willpower, I immediately quit analogs.
I tend to mix juices on the fly but if I vape much more than 15mg, I either have to consciously vape less often or I get too much nic and get a little dizzy.
I'm hoping to very slowly ease down to 0 nic or very near it. That is, unless the FDA starts putting people in prison for using e-cigs to quit rather than just telling vendors that they can't suggest that people might be able to do it.