What was the difference between peak B-class and the start of A-class? On paper, it was a difference of 50 points.
The peak was described written down as 1000 and the start of A-class as 1050 after all. But if the gap between C and B could be explained by who was, and who wasn't capable of harnessing mana… what was responsible for this small gap in B and A?
Why was there an increasingly large number of B-class adventurers but a comparatively scarce number of A-class adventurers? The real difference was… Identity.
Being A-class could not be described by simple numbers, complex numbers maybe but not by a simple combat assessment. Thus, it was a matter of identity. A defining move, a trump card of sorts that holds a trace of your power and personality. Your philosophy and your understanding. It needed some element of all of this.