On most of the mechanical mods I use:
* I build coils between .30 to .50, mostly steering toward .35 Ω.
* The mean average I push those coils is ~25 W. Top end with
a freshly charged and rested 18650 battery is ~28 W. It drops to ~22 W and then gets swapped and recharged. I do this to leave ~20% charge on a battery, something called "headspace". It helps preserve battery life and avoids booms.
These are estimates. I have compared against regulated mods, and an oHm meter during building, through random checks during vaping. I've done it enough to have it down as a "feel". Still, if I have a doubt, test it out.
I take 5 to 10 second draws, not really timed. Sometimes I know I'm closer to 2 second draws, on average I'd say probably runs about 4 to 6 seconds. Then, I also draw off the leftover vapor as well. The leftover I don't count, as I'm not "firing".
I use restricted direct lung as my style. I sometimes make vape circles just for giggles. Likewise, I sit in this room being a 10' x 12' room and fill half of it with cloud on average. Although more than not, I might only fill one quarter of the room. I like clouds, yes, but there's more to it than that for me. I vape as an alternate way to use nicotine.
I also rub snuff for the nicotine reason. Sometimes I just don't feel like vaping. Other times maybe it's bronchitis, or some crud, lower cased c crud, not The Crud. I like rubbing at work for its ease of use, little more acceptability. Yes, oddly enough, rubbing is more acceptable.