to get the .7 ohm coil to work you will need to probably set your watts to around 30...20 maybe but more than likely 30w is going to be the lowest that it will fire at
I have Zelos and two Nautilus2 tanks. I do not like 1.8 or 1.6 coils (flavor is much muted compared with 0.7)... for over 8 months I vape 0.7ohm at 18-23 watts and 23 watts is absolute maximum... most of the time I vape at 18 watt... in my opinion 0.7ohm coil is providing much, much better flavor than 1.8... one plus of using 0.7 coil is that I can place my Nautilus2 tank on my smok V8 stick... and vape is a lttle warmer but very satisfying...despite the fact that I cant adjust wattage on V8Stick.