Agree. 5-6 vapes with the triple coil at it's 'functional' (say 70 up?) wattage will get the tank warm to hot really quick. I have one, too, on my xcube2. Plus, the cool down takes a while compared to other tanks, generally speaking, since the tank is built really beefy, u can see how thick the material is and that heat will probably dissipate longer. Which is why I can appreciate other tanks that have thinner dimensions.
I now use my TFV4 with the single rebuildable head with nickel at .09ohm + TC at 380-420 F. I can chain vape significantly longer without getting the tank super hot compared to the stock coils