This new build will help make ur early game better, after the increase to zeal items cost early game spike was later. Yassuo a challenger Yasuo player recommends buying beserkers greaves first item to combat that.

Pros + Mobile around minions + Great late game scaling + Good sustain + Good survivability + Very dynamic champ + Fun to play

Cons - Hard to learn - Other players hate you - Hard to master - Hard to escape ganks - Usually focused and often ganked

Primary Runes

[*] Conqueror: Conqueror helps pump out a suprising amount of extra damage and true damage makes taking down tanks easier as it ignores armour. The best keystone for Yasuo easily.

[*] Triumph: This allows for you better survive 1v2 battles and ganks when you kill one of them. The 12% health back on takedown also helps in ignite battles where you would have otherwise died to ignite.

[*] Legend: Alacrity: The Bonus attack speed helps to max out Q cooldown earlier and helps to duel better with more dps.

[*] Coup de Grace: This allows for you to do that little extra damage when the opposition is low and you wouldn't kill them normally. Useful in 1v1 scenarios.

Secondary Runes

[*] Bone Plating: This gives a good defensive proc against burst assassins as they will deal less damage after attacking you the first time.

[*] Chrysalis: Chrysalis gives you the health to survive lane and then converts to damage once you get into the the game properly and helps so snowball your damage.

Flash: Is a great Get Out of Jail Free card. Good to dodge skill shots and suprise enemy.

Ignite: Just that lil' bit of damage to finish them off. Useful in early battle cheeses.

Teleport: Great for getting around, less punishing deaths.

Exhaust: Good versus high damage burst assassins, will reduce damage and speed.