It was apparent that, as the top-tier BOSS, Luke wasn't so easily defeated.
Especially Dark Luke; he wasn't just a tad or two stronger than Light Luke.
After he transformed into his close-combat form, Luke's speed and power increased more than a single level.
Previously, when they faced against Light Luke, Wang Yu could still handle him using speed. However, Wang Yu's speed was no longer enough to fight against Dark Luke.
Within the gaming universe, there was an unspoken rule. One should fight a ranged BOSS with close-ranged attacks. That would control the damage output and prevent the BOSS from escaping.
As for close-ranged BOSSES, players should use long-ranged attacks. While they conserved their abilities, they could deal as much damage as they liked.
Even though Wang Yu was a gaming noob, after playing the game for such a long time, he understood the gist of the fundamental rules.