Kay soo i'm a bit of a "Power Level enthusiast", and over the years i've been trying to figure out how to calculate them, respecting a certain logic, something that i would be satisfied with. I basically have an entire study around this subject that i keep coming back to.
I now that power levels or doriki or whatever you want to call them isn't something that author worry about in their stories cause it really tells you nothing but i don't know, i like them, if you have any questions please feel free to ask cuz i love to talk about this stuff, SPECIALLY if you don't agree, I'd love to hear other people's theories on the subject and i have it calculated for a bunch of other characters and series.
Again this is just my opinion and theory x)
PS: Doriki is much easier to speculate cuz it's based on one's pure physical abilities, while POWER LEVELS no one really knows what it’s about.