I think it would be good if vv/vw users were the ones responding here. Which it mostly has been. I don't find volts any more "accurate" on the Vamo than when I use watts and want to get the taste right. I don't need to switch to watts and then "fine tune with volts" either. That's unnnecessary and just complicates something that works fine by using the variable wattage option.
With vivi novas I have found the 2.8 ohm heads the best at 5- 6.5 watts. This will depend on the
juice used too though. Just start at low watts and work up to where it tastes right.
Some Vamo users will go higher than that - its a combination of the delivery attachment,
juice and your taste buds. I've found 2.4 ohms ok, but for me with the vivi novas 2.8 ohms has been better. By compariosn, my AGA-T+ is at 2.6 ohms and I am
vaping it at 8 watts right now.