Hey, I use 28 gauge, and doing a standard six wrap dual micro coil gets me to .5. I'd say that at 30 gauge it'd take two, five wrap, micro coils to get you there. Make sure you test with an ohm reader, or voltmeter first. There's also the hybrid coil video listed below in the coil section that I've tried and really liked. It wicks really nicely, and having juice between the coil sets really produces a lot of vapor. Good luck.