I love the troll atomizers, before I got a velocity or TM RDA the troll was my goto atty. I have 3 and still keep a 24ga 8 wrap simple build in them to have a fresh atty handy without having to rebuild or rewick my Velocity or TM.
It used to be one of my main atties too. That was my "when in doubt" atty. I remember I used to try and build things that were too hot for it and I couldn't.
I forgot about it for a while because I stripped all of the screws for it. The only way to tighten them down was with pliers.
But recently, I bought a used Freakshow Mini clone that didn't have screws for $5 at the local vape shop. Incidentally, the screws they scrounged-up for it did not fit the Freakshow Mini, but they DID fit my Troll. And it turned out that I had spare grubs that fit the Freakshow!
So now, I'm falling in love with my Troll all over again. I run it with an aftermarket chuff top (not the chuff that Wotofo makes for the Troll - it's just slightly narrower.) It's so awesome for big, hot vapor builds. It's got that super-wide, short chamber. The airflow layout is simple, but pivotal.
My theory on why the airflow is so genius is that the wide barrel and the long, slanted airflow channels create more suction than you get from say, a giant cyclops (doesn't rotate) or a Mutation X-style layout (rotations are shorter lived because it's too broken up.) The size and shape of the slanted airholes creates these long, consistent, swooping channels that pull with a lot of momentum keeping them moving and leave no pressure behind them.
If it's not that, I don't know what it is. There are atties just like the troll in every other way than the actual layout of the airflow and they don't produce quite as much vapor and don't keep it nearly as cool. It's as simple as can be, and yet it is like black magic.
I don't think there's a better atty out there for deep lung hits with thick, high-powered standard coils. I get some of the biggest, tastiest, most satisfying clouds I've ever gotten running .15 dual 22g coils in it. The thing just rips the vapor off of them.