Bottom coil, bottom coil, bottom coil. Always see people saying 100% VG doesn't wick well in clearo's. This may well be true with Vivi's and other top coil devices, but those Kangers will be just fine. What you'll want to do is pop the center pin out of the atomizer head, pull one or two of those top wicks off, replace the center pin, and you'll be good to go. If you get any gurgling or flooding, put one of the top wicks back. Easy as pie.
I vape JC Red Oak and Boba's all day and night with Kanger BCC's with no problems whatsoever after that one simple little tweak.