to me building has everything to do with the mod fired on, it's optimal target zone, and the vape potential of the rba being built. Acquired my Magmas before high watt box mods were available. Magie can handle very high watts easily, without getting over heated. So, started at 0.30, and worked me way down to 0.15ish.
For most of my box mods, target 0.5-0.8 ohms, since that's where most of them have optimal potential and design use. I also purrrfer 24 & 26 gauge Kanthal A1, for most my builds, and 22 for a few. I always try to maximize the build deck area with as much coil to wick as possible, while hitting me target ohms, so depending on the rba, # of coils used, type of build,......... determines wire selected.
Vape is all about balance and optimizing ones gear and capabilities.
Vape long and Prosper.!!!