I was burning coils lime crazy on that setup, I switched to 60% PG instead of 50/50 and the coil I'm on is going on over a month. Also, I find I'm using less. Those little coils have difficulty with the thicker fluids and tend to get burned out/gummed up. I also bumped up my menthol, which reduces how much I use as the flavor is stronger.
As expensive as Aspire Nautilus coils are, they're not that great. I plan on drilling out the holes a bit, replacing the wicking material with better stuff, better wire which means more control over resistance. Bought a kit to do coils, which hey, can also be used to make my own springs if I ever needed to do so. From what you're saying, 60/40 12mg runs thinner and lasts longer before gunking up the coils. I doubt I'll be able to beat a month, but should be more consistent over that month.
Btw, moved to an IPV D3. Prefer over the iStick. 18650 batteries are cheap on Amazon. I occasionally had issues with the iStick voltage up button being hit up to max, and then hitting the control button, which fried the coil. D3 has slightly recessed control buttons.
Indeed, I alternate between a Velocity RDA when I'm home or out with friends and a Billow V3 tank when I'm working. I'm always respectful of non vapers around me; but fortunately I'm usually in a situation where I'm not bothering anybody. If you want the best low profile tank out there, grab yourself a Kayfun. Tobecco makes the best clones. They're rebuildable only, and easy to use. I averaged about 6 months on a coil, and rewicked once a week or so. That's about a 5 minute process, and you just use organic cotton balls. I switched from the Nautilus to the Kayfun about a year ago, and it was a big improvement in flavor, plus a $10 investment in kanthal wire and organic cotton balls is probably good for about 8 or 9 years of vaping. I was using 18mg in the Nautilus, and dropped to 9mg for the Kayfun.
I picked up a Griffin 25 and plan on using enough to get experienced. Essentially as a backup. Enough kanthal wire and Japanese cotton to last several decades. 100ft of wire is $6.50 on Amazon. But I'm ordering plenty of spare parts from Aspire to build a number of Nautilus heads and about 30 coils, which I can rebuild. The general notion is to use the RDA at home where the large vapor volumes aren't an issue. Nautilus for car and work.
Oddly enough, biggest problem has been shattering those pyrex shells. I really don't want to switch to stainless steel, but I'm probably going to at least buy one. Again, goal is to be self-sustainable for 5-10 years. My primary concern is screwing the revenue flow to the state at the moment.
Oh, thanks to all of y'all who don't feel the need to use pocket fog machines to get your nicotine. Got caught in a cloud a while back and it irritated my airway such like tobacco never has. I wondered what dude was vaping to cause the irritation and why he needed to waste so much of it in a big cloud. Maybe the vaping equivalent to "rolling coal?"
For my own part as a non-smoker/non-vape-er, I see vaping as much superior to smoking in most every dimension. Seems about as obtrusive as drinking coffee or chewing peppermint gum.
Oh, there's plenty of giant cloud vaping twits. I think it's rude as hell. And unfortunately, too few of them blow up their faces with massively sub ohm coils and waaaaaay too many watts. Which annoys me because I haven't found anything between sub ohm rebuildable heads which are cheap as dirt but lots of low nicotine vapor and more expensive allegedly non-rebuildable (lolz) vertical coil units with higher ohm, lower cloud level and higher nicotine level.