You are right about the TC and low ohms, I run a SS .5 to .8 coil with TC except for the 160w dripbox with that I run dual SS .8 coils that meter at .4, and get a cool to warm vape using the TC set at about 370 degrees.
BTW I run a Hemi in my Dodge, and can get 26 mpg on a road trip if I keep my foot out of it, but its in a Magnum and not a Ram, much lighter car. But when passing the gas gauge moves almost as fast as the speedometer. Kind of like a mod when you turn the watts up and the battery don't last as long.