On the fat stuff (just for general info) I used to double the wick in just the coil area and wrap right onto it with nothing inside (pretty tight too). On the skinny stuff, I always wrapped a micro on a 1/16" drill bit. It was difficult, at first, to get the tip of the wick into it; but it did go in every time. (nice clean cut, little e-juice whetting, and twist it in until it takes) The pics are mostly to show how it's not constricting or deforming the shape of the xc-132 at all. (On the fat stuff, the 116, I had no concerns about choking the peas out of it)
All that said, cotton's better below .5-.6Ω, and especially for BF. Ceramic wicks pretty good, but cotton sponges better. And for sub1/2Ω on BF you want a sponge, not a wick. I haven't played with tanks in a long long time. So I'm pretty useless on that front.