Kong was in his small form so his speed was unbelievably fast, but Damian was wielding wind energy and using the Wind Blade Ability, so could also display great speed.
[Since Kong's body is invincible as long as it isn't pushed past its limit, I should keep my distance and tire it out. While doing so, I will land as many ranged attacks as I can and that is the advantage of being a mage that is also fast and well-versed in combat]
Blade Kick
The power and speed of the Wind Blades that Damian was able to unleash not only depended on the amount of energy that he supplied them, but also the force of the swinging motion that he released them through.
That made it so that a kick would allow him to release the most powerful Wind Blade, but it was also the easiest to read, while it was also the most difficult to pull off.