It's a little weird, because the way Nasu described what KH did, it sounded like it was mostly doable because he used the difference in energy between a regular saint graph and a grand saint graph to basically "balance the scales", which I think sort of aligns with how Orion was able to get a big boost when shooting down Artemis by discarding his crown, but then the question is can everyone do what KH did, or do they all have some different sort of boost that they can use that energy surplus for once they discard their crown?