I have been having a problem finding a good tank setup for my wife. She was a smoker for thirty+ years, and has been vaping for two years now. The problem is that she takes long hard pulls on her device. Are there tanks out there that will work for people who vape like this. We have tried the ViVi Nova (coils lasting only about a day). We have tried Ismoka BCC Mega Clear Cartomizer (flooded with juice in her mouth). And we have tried just a regular tank with a dual coil cartomizer with the pre-punched holes(constantly flooded with juice). She has been smoking and vaping this way for so long, it is difficult for her to change. She is using an Ego-C upgraded battery (two settings). Any help would be greatly appreciated. She is becoming very frustrated, and I am afraid she will go back to the dark side.