If your using 30 ga around a 1/16" mold, start with 10 tight (touching) wraps. This is a good baseline. If it's too warm, wrap another coil with a couple more wraps. Too cool, wrap another with a couple less wraps.
If you find that you like a warmer vape after dropping to 8 wraps, order some 28 ga Kanthal A1 from temcoindustrialpower.com. 100' is like. $6.
If you find that 8 wraps us still too cool, order some 27 ga.
Ideally, you want to reach your target resistance with 10-14 wraps with a micro coil for optimal performance