A single battery mod should handle either the .2 or the .4 ohm coils, but the TC80w would handle it better than the TC40w in my opinion. I don't use high wattage, about 40w max, but the dual battery mods supply longer battery life when compared to the single battery mods.
The .4 cleito coil is rated 40 - 60 watts, and the .2 is rated for 55 - 70 watts also there is a .15 coil rated at 120w, but don't know if it will fit in a standard cleito, or if it just fits the 120w cleito. For the 120w coil you will need a dual battery mod.