A dripping atomizer on anything. Or my bottom feeder with any open post atomizer. Consistent, hassle free and they last forever for me.
Mine is simply a IBtanked with a 2 ohm smoktech carto. I have kind of abandoned them though til I got my Provari. Now that is all I use.
I've been wanting to try one of Aspire's BDC's. Just pulled the trigger on a Pyrex ET type from this site. Pretty good price.
Has to be a Kanger T3S for me. Although I'm loving the iClear 16's too (Even if they are a little warm for my liking)
James

Yeah, as many have said here, no such thing exists. As far as my most trouble free topper? The Iclear 30s with caveat. I am only vaping light juices in them, and they last a long time with a good, strong consistent vape. So much so in fact, that I haven't seen the need to try to clean the heads; I just buy new ones. I do keep dark and sweet juices in my PT2's, which I re-build. The PT2's are also good, but quite a bit more fussy.
Someone recommended these Evod-type clearomizers. They look just like the original Evods, but have a larger capacity. I've been thinking about ordering some, because I like my Evods so much.
Kanger MT3 Rebuildable Clearomizer - Black
Ibtanked with laser drilled Boge LR cartos, super consistent and trouble free other than the obvious carto dies out and needs replacing from time to time. Ive chain vaped till im green in the face and never got a dry hit
Any tank/wicking system out there is going to be inconsistent at times. Gurgly hits, dry hits, flooding, cooked e-liquid, muted flavor, etc etc... There are too many variables to be truly consistent and not frustrate you at some point. The viscosity of your liquid... the temperature of your environment. Wait 'till the hot weather of the summer hits us; you will see a leaking/gurgle thread pop up every other day.
The only 100% bullet-proof consistent vape out there is with direct dripping or squonking.
You manually apply fresh e-liquid directly to the coil and vape. No wonky wicking system to rely on or troubleshoot.
What's the saying? - "If you want to see a job done right, do it yourself."