I just want some opinions to experiment with...which coil build do you find has the best balance between flavor, clouds, and battery life for RDAs on a mech? Preferably stable on an eFest 18350, I'm looking for the best balance on my lower-profile mod. I've also got Sony VTC4s in a mech, so if you're in love with a coil for those that has good battery life, I want to hear that too. My most "perfect" vape is at 0.4 Ohm single coil 1/8 inch airhole on a mech with VTC4s, but the battery life is abyssmal. I love tinkering and have lots of wire, so if you suggest, I'll likely try! Thanks in advance!