About the only way I can think of, since most premade coil units are kanthal, is to use a rebuildable coil head or deck. That way you can use stainless steel wire and use your TC mode. This will greatly reduce your battery run time though. 6 wraps of 24ga SS take about 4 times the wattage as a 6 wrap 24ga kanthal coil. (approximation). The reason is that SS is a conductive wire and kanthal is a resistance wire. Basically SS is great for making frying pans and pots but not for making the heating element on electric stoves. Kanthal takes lower wattage to heat, but similar to cast iron, would take longer to heat up if used to make the same frying pan. Not a great comparison, but should give an idea about resistance vs conductive wire.
Now as far as wattage vs TC there really isn't much difference, once you set your mod to it's sweet spot. Although, TC mode might let you avoid dry hits, since a dry wick would allow the coil to heat more, tc mode would cut the power down and prevent the wick from burning, straight wattage would not (so you make sure your wick stays wet)
Personally, I prefer wattage mode as it provides a steady vape where as tc might fluctuate during the pull.
Footnote: Kanger toptank mini comes with a rebuildable coil head (RBA Mini) and a 3 strand parallel coil (32ga SS wire) x 6 wraps (18 total coil loops) on a 2.25 mm id core, works quite well at about 33w and would work in TC mode.