I'd stick with it for a few more months. My next ZampleBox is 6mg/ml and should be around 90 ml in the box. I have a a good two month supply or so between some 18 and 12 mg liquids and a few mls of 36 mg unflavored....
Depends on the day, I go between 2 and 4 ml a day.... A year ago was stepping down to 24 mg from 36, went to 18 mg this Feb and April went down to 12mg.
If it got just as expensive, or more, to vape, I'd stick with it as I'd be down to 0 within 6 months or so, and I'm vaping alot less now than when I started two years ago. But, then again, I didn't start vaping to quit smoking, I started because it was cheaper, way cheaper.... Not including equipment, which I rarely buy anymore, I spend maybe $15 a month.... That would get me three days on my smoking habit two years ago.
Which reminds me, tomorrow is 2 years exactly....