OK now I know you are limited to the wattage based on the ohms of the coil. Which is quit a range of vapability. Say you have great batteries that means anything from 150watts down to 1 watt, somewhere between .1 and .2ohm for the 150watts. Great. Same mod could also be built to vape at 2ohm and 5 watts if you choose.
Now what kind of vape do you want? 100watts, with big clouds and muted flavor or 15watts with a more refined flavor but less cloud
How many times a day do you want to change batteries? If you are after that 150watt vape it will be often, if after a 25watt vape, every couple days.
See you device s not going to determine the best build for you. Your needs and desires will decide that.