Ctaylor, you Need to find that right spot for yourself. Most folks dont like much over about 9 watts while some are ok up to 12, some prefer over 15, just keep in mind the higher the wattage, the more liquid you will be capable of vaporizing, and faster. You my friend where above 17 watts if you had a 3ohm atty on your 7.2volts........ Keep the atty wet. I suggest somwhere around 4.6 or so but even that is gonna be warm at almost 12 watts...... In this excercise You are intentionally trying to limit your wattage output so that you dont need to vape asbestos flavored juice just to keep it from tasting like roasted coil-de atomizer...... Good Luck. Happy Vaping.
P.S. I vape a boge 3ohm at 5.53v most of the day so the chart in the previous post May be a little misleading. It is afterall a Guide, not Law........