yea 24 seems a lot to me (and i smoked sometimes 5 cigs a day sometimes even more than half a pack)
im on 6mg 2.5 ML a day so my way down is gonna be faster i guess
I know, coming into the conversation a bit late. But, I would vape until you feel like you don't need to, and vape when you feel the need to. Your first goal is the hardest.. to transition to vaping first. If it involves chain vaping, then that's what it takes.
Most people don't realize, a cigarette has 2000ish chemicals in it, and Nicotine is not the only addictive chemical. So your first step, is to cut out the 1,990ish chemicals first, and switch to just one addictive chemical...which is nicotine. Once you get it down to just nicotine, you can start to ween yourself off of that slowly by reducing the MG/ML in your juice. But start with the first step... quitting the stinkies all together and switch to a vape only device. You can manage the nicotine levels in vape, you cannot (or at least, not easily) with a regular cigarette.
I also wouldn't worry about trying to match your nicotine level from smoking. Although I went through the same worries, there is a lot of confusion about what equals what. There are so many variables, that it's not easy to make a comparison. For example, the absorption rate between vaping and smoking are different, along with the chemical additives added to a cigarette to prolong the nicotine in your bloodstream (one example, being ammonia added as a binder to the cigarette paper). The nicotine in a cigarette essentially stays in the bloodstream longer. Delivery method also helps cigarettes deliver nicotine by having smaller molecules and penetrating deeper into the lungs, and once there, the tar helps the nicotine stick to the inside of the lungs. So, there is no 1:1 relationship between the nicotine in a cigarette and the nicotine in a vape. Just find your comfortable level, even if it means vaping more often then work from there towards your goal.