Hi, I'm wanting 2 build micro coils for my Protank that sit on top of a small variable voltage battery that'll run 3.2v-4.8v. I've heard that the lowest ohms my battery can handle is 1.5 ohms? I was wondering what size of ribbon kanthal is should get? I'm trying to get the most coverage on my wick without going below 1.5 ohms. Also should I use cotton or what would you guys suggest? Thanks!