I am mostly an rba tank kind of guy. I prefer dual coil on dual coil atomizers and single coils on single coil atomizers. I build for the vape satisfaction and optimizing the rba being built. On the Aqua I use a .3 ohm dual twisted 28 Kanthal build, using 2 stands of tightly twisted wire on each coil, so basically it a dual quad. Provides a nice warm thick satisfying vape, I love it. On my Flash-e-Vapor V2's I use a single coil design. But with 3 strands of twisted ribbon Kanthal, twisted together, so technically it is a tri coil, both are around .75 ohms, give a fantastic flavorful satisfying vape, I love it!. The flashi is really rba/rda, since it's a dripper with a tank, but can be used in either form, I prefer tanks. Tis my favorite rba so far. Also have the full size Russian, using a vertical mounted dual series coil using the triple twisted ribbon, It comes in at 1.3 ohm but driving it at 20 watts, another great flavorful vape. i love it!! The only rba that I use single wire single coil in is the Taifun GS, just to small to use anything else, it also give a damn fine vape, and is cute to boot. lol
I find that the juiciness of juice doesn't get fully developed till one hits 15 watts, it is just tastier. Got to 20 watts, even better, if you have the battery that can handle the load and the atomizer that can wick and breathe well enough to handle the watts, once you get pas 30 watts, the Vape become very hard to describe.
The reason some feel that those who vape at sub ohms, high watts are safer, it that we who choose to are much more focused on high amp batteries, battery safety and maintenance, build maintenance and checking, so that if a dead short does happen we have a much better chance of alleviating disaster because our batteries have a high continuous amp limit and a much higher burst amp limit than most who vape standard ohm builds. When using a mechanical, it don't matter what ohms you start at when one gets a dead short. but if you are using a 30, 35 or 50 amp continuous battery, you have more time to disconnect before current overrun can happen.
Saying things like, I don't see any reason to go dual coil or sub ohms, is the same logic as saying, my cig-a-like/ego bats provide just as good a vape as a SVD, Provari, Zmax.... i don't see a reason to go there. Well if you are satisfied with what your are vaping at, then don't bother, but if you find yourself with that something is missing feeling, then it is a option to explore. But trying to explain the quality and vape satisfaction i get from my mods, builds and juice i make, just can't be adequately conveyed. I chase total vape satisfaction in all my builds, rba's, and mods. Clouds have been know to form and fog does set in, but that is not my focus, just a by product of searching for total vape satisfaction. My only problem is that once i am satisfied, i then want more. lmao
Vape long and Prosper.