My interesting thought:
I think YG does not need to learn the Flying Dagger technique and could still be pretty effective, in an alternative way
He could throw the dagger at an opponent from an effective distance and use the Divine Flicking technique to hit the dagger while it is in motion.
Doing this would increase the velocity of the dagger and increase its power significantly.
If the dagger hits its target, it would cause devastating damage.
YG would need to practice with this technique until he has achieved great accuracy.