I pretty much agree with
@HondaDavidson but I've also found that atty design makes a difference. Generally though and within reason, with a given atty and coil/wick, higher watts will vaporize more juice per second of puff and that translates into more nic per second. Resistance isn't directly related to amount of juice vaporized, but generally lower resistance coils use thicker wire and that can mean more wire surface area. Then again, if you use the same wire and inside diameter, one with 6 wraps will be higher resistance and more surface area than one with fewer wraps so you have to be aware of the details. If you use Steam Engine, it's all about heat flux (affected by surface area) and heat capacity (controlls coil heat up time at a given wattage).
I mostly vape between 1 - 2 mg/ml nic these days when I do use nic, vaping at between 15-40 watts depending on the device and how I set it up. I use no VG in my juices to maximize TH and I put coils farther away from air holes for the same reason. I find I can get noticeable and for me adequate TH at around 20 watts with 1.5 mg juice. At 3 mg I can turn down the power to less than 15 watts with the right build, but it becomes a 'lazy' vape in that I'll take longer drags.
I can also get some semblance of TH from zero nic juice at 30-40 watts. The max PG, some menthol and a hot build really help with that. Of course, I'm pretty sure that someone who is used to 6 mg at 100 watts would find no TH satisfaction at all from this vape