Just for comparison you might try a 2.5mm SS316L coil with 8 wraps for a resistance of around 1 ohm. I like Sally's Rayon. I just cut off a 2 inch long piece from the roll and pull it apart for the width I need and put the rest in a ziplock for future use.
I flip back and forth between 2mm and 2.5mm. 2mm makes a coil that requires thinner wicking for atomizers that have smaller
juice wells. 2.5mm works fine, but for smaller decks you might need to fan and trim the tails to fit the width of the juice wells.
For me, Cotton expands and Rayon tends to compact and shrink as the juice wets it. The fibers are finer than cotton and I trim the tails to make them contact the deck squarely. I look for light to medium drag with Rayon as I pull the wick through the coil.
Something like this is what I end up with using Rayon. Just tuck the ends in the juice wells.