I went from 12mg, to 9mg, to the 6mg I'm at today. I've been considering dropping again, but I don't know if I should go to 4.5mg or 3mg - either way I'm back to mixing different strength juice again.
In my DIY liquids I went from 6mg to 0mg last summer, and didn't even notice the nic was gone. You might try that if you really want to get off nic. In my DIY I haven't used nic since last summer. So most of the 6mg and all of the 12mg liquids I have are premades bought at the lowest nic they had available at the time I bought them. I have the supplies to cut them easily, but I usually don't bother. Why I mentioned the intensity in my first Heron build recently... first fill was an intense liquid because of the flavors in it, it was a 12mg premade and I take long lung draws. IOW that's one of several I have that I will have to cut to use them in my Heron's, probably the Spheroid as well when I didn't need to cut them for my other toppers. It's either that or go through life looking like Rip.

Heron love.