I've been using RDA's such as the Haku Cruiser and Vandy Vape Pulse BF RDA with single coil builds in the region of 0.18-0.25ohm (which is what I normally use with mechanical squonkers), and the Vandy ...

The last time she tried a cigarette, she said, she was repulsed. To vape, Collins uses a $300 rectangular brass modular device — a “mod” — that fits comfortably in his hand.