You may want to read this.
Taste Your Juice | EVIC-VT HEADS UP…
Apparently the evic VT will hit your coil with a 30+ watt surge for about 0.5 to 1 second when you either switch tanks or it wakes up from sleep mode, or you turn it on. The purpose of this is so the mod can detect whether your coil is a temp control coil or not. After the surge, it settles down to the wattage that is set. So if you have a coil on there that cannot handle that surge, it will scorch your wick. So the device really isn't designed to use 2+ ohm coils. If you're using a subohm tank, you won't notice this surge at all as you will most likely be vaping at 30 watts or higher anyways.