I noticed that this Zed player doesn’t always build Duskblade. The reason I can think of is that he has the confidence to maximize his damage dealt (Landing 3Qs, EA before ulting etc), he doesn’t NEED that extra duskblade damage like most of us do. Therefore he goes black cleaver second for HP and CDR. Definitely one of the best zed player in the world, impressive.
I’m a plat zed player, it’s safe to say even though their are so many other flashy combos, that combo is the most safe and practical combo to use, ESPECIALLY in high elo. One mistake costs the whole game in challenger.