For a Regulated Mod, the Ohm of you Atomizer has Nothing to do with the Amp Draw at the Battery. It's the Watts that are Important.
On the Steam Coil site, Start withe these Setting...
Device Type: Regulated (APV)
Mode: Power Regulation (WW) _ 40w
Battery Voltage: 3.4 Volts (or whatever your Mod stops working at when the Battery is Drained)
Battery Capacity: 3000
Now Look at the "Battery Drain" section.
View attachment 1026410
You can see that you that you are Way over 8 Amp when you vape at 40 Watts and the Battery is getting close to being Drained.
Play around a little bit with the Battery Voltage and see how a Fresh Battery / Lower Watts doesn't require as many Amps. And/Or why it is Recommended that people get 15A CDR 18650's of Higher .