Ah, very well, on the first two points.

Though, we can't reliably apply power levels to attacks, even with your example. We have a lot of energy-types (Gabe, Stephen, Peter, etc) and they're all capable of different things. For example, Gabe can shoot a laser with volcanic levels of heat, Sylvia can shoot blasts of sound that can destabilize buildings without coming close to ashing (Though, they both have their own consequences to doing this). What would you classify those as? My point being is that there's a lot of variables.