I only started vaping Sept 7th, 2015, and I skipped the low power vaping completely. I started w a Sigelei 75W box mod and within 2 to 3 weeks moved up to where I am now with a 150W Sigelei. I thought that the lower ohm coils would make it desirable/possible to vape at a higher wattage, and possibly get something more out of the juice, but I have not found that to be completely true.
What I have found w the 150W box mod is that I vape most of the time btw 50 and 80 watts, with a 0.3ohm coil, and I dial it in for flavor. Right now I'm at 57.5W to 75W vaping, "Breaker." I've just cleaned three other tanks..and it is possible that I'll be vaping at a higher wattage than 55 but I rarely go over 75 watts. I can vape Breaker at 75W no problem, but I don't go above 80W to avoid burning the coils. The 0.3ohm coils are rated for btw 70W and 80W. If you do not pay attention to what you are doing at higher watt draws, and do not draw hard the moment you hit the button...you will burn coils, and then there goes that. What I like abt the 150 is that it has dual 18650s and the batteries last all day.
I don't worry abt juice consumed. 100% of it is going in to my lungs, and not going to waste. I've got plenty of store bought juice and around own TEN - 250ml bottles of 100mg Nude Nicotine. I'll never run out...at least that the plan.