I vape between 50-75 watts.
On a single battery mech, the Samsung 20S fully charged will give you 75 watts on the first hit if the resistance of your coil build is about .19 ohms, and will be drawing about 20 amps. But because the vape grows weaker with every hit, it might be a good idea to compensate (as I think most of us do) by lowering the resistance taking shorter, more powerful hits when the battery is full so maybe try a .17 or a .16 and go from there... personally, I, don't think 50 watts in a typical 24mm RDA is anywhere near powerful enough to provide dense vapor for a satisfying vape experience, but that's only me.
A common misconception is that choosing a higher wattage will necessarily give you a hotter vape. That greatly depends on the total surface area of the coil build, the airflow adjustment (and the coil positioning with regards to airflow), and also the strength of your draw... I find that choosing lower wattages for a coil size I consider medium/normal sized for your average 24mm RDA tends to gunk up the coils faster and just heats up the atomizer slowly boiling all the nice flavor into oblivion instead of actually producing some real flavorful vapor, but again, of course that's only me. Another thing is advanced coil types with countless tiny cavities/crevasses (e.g., alien coils) help to keep wicking juice faster into the coils during the pull so there's less of a tendency of, despite the cotton is still saturated with juice, the coils semi-searing into the cotton near the end of the pull if taking a bit longer drags. I hope this helps.
