Erlkonigin gets my vote for a single coil. I have a clone. Its my currant darling. I even put the Fogger in the box and its been there for a solid week now.
Out of my 5 or so heads, its the absolute easiest to coil and wick. Once you get the wicking down, it takes but minutes. and it gives a seriously warm and dense vape, at the slight expense of volume.
(Disclaimer: It had many issues coming from fastech, but they all got solved and as I said, its my darling now. But if buying for FT, be prepared to sort a few things out!!