Need Help for Round Wire Build on a Orbit Mission xv RBA.

Does anyone know what is the perfect wire gage, wrap count and inner diameter for a Mission XV Orbit RBA? Mainly I’m after battery longevity and maximum flavor. Will most likely go with round wire since it will be cheaper. I’ll be going through builds pretty quickly due to the Dessert flavors I really love.

Any help would be really appreciated.
Thanks.