This might seem like a bad move actually, but right now, and thanks to the sudden attack William and Ibra launched, the leopards were distracted and quite weakened.
The moment the two groups pushed inside and pressured the leopards, the monsters finally started to fall back, even showing gaps in between their ranks.
They were just monsters, moving and fighting based on their monstrous instincts, lacking any real intelligent being out there to lead and organise them.
The moment the two groups managed to bypass the closest monsters to them, things started to look better.
In the middle of all this, William kept flashing around, returning to his old tactic to just wound monsters and keep them busy with him. Ibra waved his glaive right and left, throwing off one leopard with each wave, clearing a wide gap in there.