You are lucky to get any vapor at all at the lowest possible voltage or wattage settings. You can select between Mean and RMS at Menu Item #8.
The Sigelei Zmax uses the same Yihiecigar developed Zmax chip but has its own Sigelei firmware. The Sigelei hardware is completely different. So, I don't know much about operating the Smok Zmax.
This video may be of help. It shows just about everything you need to know.