To be honest almost all coils are gonna last about the same time. When I use naked 100 or transistor I get about 120ml on my cloud beast with any smok coil and about the same with blazer and arco coils. If I switch to my buddies home made stuff with almost 0 sweetener then it’s 200+ml. It’s all about your juice. Sweetener Caramelizes the wire and turns black. Once they is enough residue built up then you get a burnt taste and then that’s game over. Also some people do not pull hard enough and they’re mad while they are taking a drag which Does not give sufficient airflow over the coil to cool it which ends up burning the cotton.