Well, yes, you can refer to that chart if you want. But it's really talking about how the juice tastes, which is subjective. You may prefer it warmer. The only thing you really need to worry about is battery safety. i.e. Not pushing the battery too hard.
But with mods that aren't mechanical (i.e. just a piece of tubing), the circuitry within the device should be the limiting factor anyway. For example, your battery shouldn't fire enough volts, or at a low enough resistance, to risk any damage to the battery.
Beyond that, it's really just a case of making adjustments until you find a vape you like. Some may prefer vaping at 3.7 volts, and others may prefer it at 5 volts.
Basically, ignore the numbers, and trust your taste buds. They will keep you right. The only thing I did find when I first moved from single to dual coils, is that at too low voltage, I was getting flooding and gurgling. Just upped the voltage and that disappeared. And tasted better.
When you move onto mechs, then you have to use numbers to work out how many amps you are drawing on the battery with your coil at 4.2 volts. But that's in the future.