Hello ppl of Mobafire I am a main Yasuo so hence the first build I made was for him. For the length of time I have been playing with Yasuo I tried every build I can think of with this one coming out on top as I have won over 55% of my games with it.
This build works best with Yasuo's kit but only works with one playstyle which is passive aggressive as the name the duelist was given because of it. Yasuo does good damage early game but is squishy so I maxed out the amount of life steel I can on his masteries and runes to give him that extra sustain both in lane and late game.

This build works so closely together it really is the best you can get, each item, mastery and rune helps the other out. Most Yasuo build say to get the static shiv first but my build has Phantom Dancer first and here is why, with the passive aggressive playstyle you want to be dueling (1v1) as much as possible and there is no better item to do so than the Phantom Dancer, it has a damage reduction passive that will give Yasuo the edge against any opponent, and this passive works really well with blood thirsty as you can life steel more, Phantom Dancer also gives you movement speed and the ability to walk through minions so you can chase easier, Movement speed which decreases the cool down on Yasuo's E and builds his shield, with attack speed which decreases the cool down on Yasuo's Q, sound like one hell of a duelist to me.