Its actually not that tough if you can get over the mental block that comes with it.. When I started almost a year ago, my first setup was the good old Kanger EVODs, and I eventually got a Protank 2 Mini for it. I could do 24 no problem with that, I was a pack a day of Pall Mall red 100s for like 20 years. Fast forward a couple months I upgraded to an MVP and a full size Protank, and 24 was too much so it hurt my throat so I went to 18 and didnt really notice the difference at all. I was just happy I wasnt smoking.. Now a couple months later I got my first Kayfun Lite and damn.. 18 blew my head off. I immediately went down to 12mg, the 'satisfaction' was still there only I wasnt physically hurting myself doing it. When the Kayfun 4 came out in January I was down to 10mg since that tank had such a more efficient hit than its predecessor. Got my first dripper, a Magma around the same time and it was ok with 10mg but the Magma isnt exactly made to be a lung hitting cloud machine. Fast forward a couple more months later, I got my Derringer dripper. No way in hell I could vape even 10mg off that. I started making my own juices at 6mg right away, and even then I can still give myself that headrush if I chain vape too much. When I tried it in the Kayfuns it really wasnt that much of a difference so I just kept at it. Its really not as bad as it seems cutting down, like I said alot of it has to do with just 'getting over it' and doing it. For me, my smoking is more of the actual habit thing as opposed to needing nicotine, and I have a feeling alot of us are the same way, especially us chain vapers. Now I have my Samurai Bonsai and 6mg is the highest Im ever going again. Any higher and I would be puking left and right from the nic I bet. Granted everyone is a bit different but I just 'rushed it' everytime I cut my nic level and just dealt with it and Im still happily at 6mg in less than a years time. I would think the Subtank would be pretty gnarly so it might not be as bad as you think it will be. I go through juice like crazy now, but Im pretty much only dripping now, and luckily I started making my own last November and the cost of making your own is so cheap compared to having to buy overpriced vendor juices that I dont care. Ive got 240mls of fresh 100mg nicotine in the fridge I just got last week, and at the rate I vape and go through juice, thats STILL like almost 10 years worth of nicotine for me once its diluted down to 6mg. I still dont notice any difference than when I started at 24mg, if anything the vape has just gotten that much better, and hey, Im STILL not smoking and my body feels so much better than it did a year ago.
If anything its my drinking that causes more problems than my vaping hah..