Just quit it all and stay quit. You're right about this being an addiction but also realize that while smoking & vaping you have been establishing an association of pleasure (getting your nicotine fix) with a wide variety of life events - happy ones, sad ones, stressful ones and many more. The longest part of quitting is learning how to live again happily without having that cig or vape device hanging from your mouth through future life experiences, You CAN do it, just like many of us have done it. Just don't smoke; ever
Well, all people find their way differently. I basically used the vape as a structured transition. I spent a week using the Vape with nicotine, a week using the vape without nicotine, and now I'm on day 3 of using neither, but I think that it really helped me in that first week of no nicotine to have a way to "smoke" without nicotine. Each step for me represented a small victory, and I personally think that it was easier to drop the vape after my hardest days, than it would have been otherwise. Each person is different though, so what may work for me may not work for anyone else.