Also depends on WHAT you're putting on the battery - carto, clearo, what?
At lower resistance, the coil will get pretty hot. This means you need the coil to stay wet with juice. An atomizer or carto IMO is okay at low resistance. Many clearo's burn the wick at low resistance though(Kangers and Vivi's which are both decent clearo's).
So, with my C-twist at 3.2 to 3.6 volts, I was better with a clearo coil at or above 2.2 ohms to avoid/minimize burning. Can still burn if you let the wick get dry. I was very happy to upgrade to a carto/tank. Carto produces more vapor, allows lower resistance at higher voltages(warmer vape), doesn't burn, and the tank keeps the carto filled up so I can vape all day with one or 2 fill-ups.
Hope this helps.