what is the reason you want to go so high? It's about the vape (throat hit and vapor production). Variable Voltage allows you to adjust your setting to get the vape you want from whatever ohms or
tank/carto/vivi/genesis system that you have. When I used to use
tank carto systems I tried different ohm cartos and you just adjust to the vape that you like. I strictly use Genesis rebuildables now and no 2 coils I've wrapped are exactly alike, they vary by a 1/10th of an ohm or so or even at the same ohms vary slightly in vapor production... most likely from the differences in wicks. The point is the higher voltage you run doesn't necessarily give the best vape. 3.0 ohm carto/tank setup I used to run at 4.8 to 5.0 voltage. I get much better vape now from Genesis system at 3.8 to 4.0 voltage and the even better perk is less energy use and longer lasting battery life with the lower voltage setting.