I like to keep my coils in the 2.4 range, as it allows for greater variation on the MVP (or any VV/VW device). Greater variation means more ability to fine tune the vape.
That said, best procedure is to just start low and increase the voltage until flavor starts to go south on you, then back it down slightly.
We all have different tastes, different juices. There is no one "right" setting. What I like for my juices may be over-whelming or wimpy for you and your juices.