My settings (which are available on some of the Ecig files I've posted) are 420F, 30-35 watts, preheat 60-65 watts, punch 5. I use a little higher power (the high end of the range) for 316LSS because I usually use Claptons (28,36). The lower end is for regular wire. The Temp stays the same but if you are using beefier coils, you raise the power to get them up to temperature. The greater the metal mass, the more power that's needed.
PS If you hook your mod up to Escribe and go into the device monitor, you can see exactly whats happening when you take a puff.
Cheers,
Steve