Ohms should actually be the resistance of your coil head, not the battery. The higher the ohms, the more volts you will need for a good throat hit, you can either vape by volts or by watts. It can not be both as watts are really a calculation that uses your ohms and volts together. I think it's the ohms squared divided by the volts, which equals total wattage. Your device should remember the last setting you used for watts, or remember the last one you used for volts., but they are two separate settings that you can choose from. Variable volts is like driving a stick shift. You would need to set the volts higher for a higher resistance coil, and lower for low resistance. Using the watts setting is like driving an automatic,. You set the watts you like, and even if you switch coils or clearos that have a different ohm reading, your device will automatically adjust the volts it sends so that the watts are what you set it for. No adjusting of the volts needed by you. Trying vaping at a lower setting, either by volts or watts, and keep moving up until you get a hit you like. If you switch a coil or clearo and you are in volts, adjustment may be needed again to find your sweet spot. If you are in wattage mode, you should get the same hit you left it at.
I think I have a different kit than what you are thinking of?
This is the battery I have, although my tank is different:Torpedo V2 Variable Voltage E-Cig Kit - Intermediate Kits - Kits
With this battery they told me I can adjust both volts and watts for my liking of a hit... Am I not right though? I usually run like 3.6 to 4.0 volts and about 6 to 8 watts. I am confused..