Hi
@hellivioze
You sound like you are doing OK... good job.
A few comments. (I'll try to be precise and talk about general stuff).
20 cigs a day is/was not that heavy compared to some. The 2-pack smokers often used 36mg even, but that was with early tech hardware.
Using a low-power device, 24mg was
at one point in time a very popular strength.
I would say that we have a lot of evidence to say the most widely-used strength when these devices (eGo e-cigs) were the talk of the community (2012/13) that 18mg was the more common (of the two).
These days, people think of 18mg as quite strong and 24mg as almost insanity... I can assure you it is not.
The early days vaping are tough and it's not just the Nicotine.
If it's working, keep vaping.
From what I've seen and heard (and read) if we consider you are vaping the same as the eGo/clearomizer vapers back in 2012/13 then 18 or 24 was normal and 2-3ml is actually a little lower than many.
f.w.i.w. I used 18mg, an eGo and cartomizers/clearomizer/cartotanks.
3ml was what it took. I never managed to stop with 24mg cig-a-likes and campaign against them to this day. We need them on sale, but they are not good, really.
It actually took the e-cig industry a while to make a battery and tank that was able to emit as much Nicotine as a cigarette and even with that level in the vapor, the yield to the user was never able to lift the blood-level of Nictoine to match smoking.
Basically, it's highly likely that no e-cig can solve cravings 100%. You have to keep yourself 'topped up' to even out your Nicotine over a day and will never get the 'high' of a smoke.... that's why many people quit vaping and say it's rubbish.