clearos use high gauge wire. Id be surprised to see 30gauge. Normally is 34 or 32. And its not a micro coil. Its a spaced coil, and the diameter is tiny, with minimal wick.
Its also the reason why when you build your own coil, and long as the wick is wet, you can't really ever burn it, but you can easily get burnt hits from too high voltage on a clearo.
But if you want a fast firing RDA build, thats definitely attainable. Try 3 wraps, spaced coil, 28g. prob get you around .7ohm. I used to do that on three strands of 3mm silica on an Igo-L. Quick firing, not too hot, entry into subohm vaping coil build.