The thing to remember is just because you have the ability to go 150 watts doesn't mean you need to use it all the time. You do realize that by firing a .4 Ω coil at 150 watts your pushing nearly 20 amps and 8 volts. That's A LOT. If its clouds your wanting to make you can achieve what you want by building a .4 Ω dual micro coil and running it around 40-50watts. trust me, that'll make monster clouds especially if your using high vg e liquid. I suggest that you watch some youtube reviews on building and wicking coils. Dual coils seem to work the best for me. but remember the higher you set the power on your device, the faster your going to go through juice, the faster your gonna trash your coils and wicks and the faster your gonna kill your batteries.If you have a smart phone, download the free app vapers toolbox, this will help you a lot with building coils and learning ohms law. Hope this helps.