I mix it up with the nic levels right now. I have a 24mg that is my at work liquid. I can only vape when I go on my breaks, so I like the higher strength to get me from break to break. At home, at least right now I am more of a chain vaper, so I got a 12mg for that. When I order a new flavor to try out, I aim to get it in 18mg, halfway between my 2 points. I do that because I don't really know how much I will use the new flavor, and it lets me be right in the middle. So far it seems like a fairly good mix for me. I can't really attest to sleeping problems because before making the switch, I already suffered pretty badly from insomnia and some nights even 6mg or more of melatonin wouldn't knock me out.
Like everyone says, find the level, or mix of levels that works for you, and go with it. There is no black and white you must do this to achieve that with these.
Like everyone says, find the level, or mix of levels that works for you, and go with it. There is no black and white you must do this to achieve that with these.