This is where you'll find basically how your power matches up with everyone elses. The 1 stands for a normal Human with next to no powers. It's not that someone with a higher power level automatically hits harder (though this is true to an extent), this is mostly to ensure that people don't get power-crazed and claim that they can out power someone of higher rank. (Exp. A Base (aka 'Rookie' or 'Grunt') level human would stand low chance against someone like one of the 7 Deadly Sins.)
Base/Rookie/Grunt
Human - 1
Angel - 1.5
Demon - 1.5
Archangel - 2
Nephilim - 2
General Level
Human - 2
Angel - 3
Demon - 3
Archangel - 4
Nephilim - 4
Captain Level
Human - 3
Angel - 4
Demon - 4
Archangel - 4
Nephilim - 4
7 Deadly Sins/7 Heavenly Virtues
Angel - 10
Demon - 10
Archangel - 10
Nephilim - 10