The rankers only managed to reach Luke after he had exhausted all of his traps, but not before their numbers had been reduced to less than 25.
By this point, there was only a single very predictable path for the rankers to take to reach Luke, and while traveling on that path, they ran the risk of exposing themselves to his quick, devastating attacks.
As the first ranker made the final leap onto Luke's platform, Luke's fury boiled over, fueled not just by the thrill of the fight, but also by the memory of his father falling to this ranker's sword in particular, as he was the one who landed the final blow.
Luke raised his sword high, eyes narrowing in on his target, as he unleashed his newly learnt move.
[Heaven's Strike]
With a single, furious leap, Luke soared into the air, his sword glowing with the intensity of his anger.