Rui had underestimated just how greatly the Fulminata technique amplified his reflexes. It was an entire order of magnitude above his baseline reflexes. His baseline reflexes were not unimpressive either, far from it. Even his baseline reflexes were significantly superior to Rui's.
That was what the VOID algorithm was competing against. It was true that Rui had an incredibly robust predictive model, but the fact of the matter is, much of the power of the VOID algorithm went into bridging the gap between their reflexes.
('This is the power of two grade-ten techniques working together with high synergy,') Rui couldn't help but feel awed.
He didn't doubt for a second that the Fulminata technique was a grade-ten technique. There was no question. The sheer boost to his reflexes that it granted easily put it in the same Realm as Godspeed.
Furthermore, the two techniques had an immense amount of synergy with each other and covered each other's weaknesses with their strengths.