This is my First build that I'm releasing so if you guys like it then reps up :)

Cons
PROS
+ Nice Blocker with Wind Wall
+ Dont need Mana
+ Easy Farming with Steel Tempest and Sweeping Blade
+ Long Range and short Cooldown Ulti Last Breath
+ Only needs 50% crit to have 100%
CONS
- No escape spell
- Really hard to master
- Last Breath long CD on refresh
- Really complex Champion
- Steel Tempest short range

STEEL TEMPEST

FIRST AND SECOND CAST: Yasuo thrusts forward with his sword, dealing 20/40/60/80/100 (+100% AD) physical damage to all enemies in a line. Successfully landing Steel Tempest grants Yasuo Gathering Storm stacks for 10 seconds.

THIRD CAST: The third stack of Gathering Storm causes Steel Tempest to send out a whirlwind that travels in a line of 900 range and sends all enemies caught Airborne.
If Yasuo casts Steel Tempest during Sweeping Blade, the ability strikes all enemies immediately around him, having a radius of 375 instead.

Steel tempest can critical strike and apply on hit effects for the first 475 range. The ability is also unaffected by cooldown reduction, instead, the cooldown and cast time is reduced by Yasuo's attack speed.

Steel Tempest is a really nice for harassing and farming. Range is REALLY short but has a really low cooldown.

Whenever your jungler is coming, have your Steel Tempest and throw up your enemy. Now you can land your Last Breath. The armor penetration buff is really good for fights. So use it as fast as possible.

When laning against people, If you go against Ap champs with a lot of range (mid), max your W 2nd. If laning against melee (Top), then max your E 2nd.

WIND WALL

Passive: Dashing replenishes Yasuo's Flow faster for 4/8/12/16/20% of his maximum flow
Active: Yasuo creates a wall of wind with a width of 300/350/400/450/500, that slowly drifts forward for 3,75 seconds. The wall blocks all enemy projectiles except tower hits.

Wind Wall is a really useful skill against AP Casters. It blocks every projectile skills and ranged auto attacks. From Nidalee's Spears to Ez's Ult, everything will be blocked.
Warning! Not every Skill. Only projectiles and not Final Spark or something.
EX. Vi's Ult

SWEEPING BLADE

Yasuo dashes a fixed distance through an enemy, dealing 70/90/110/130/150 (+60% AP) magic damage and marking them briefly. If Yasuo uses Sweeping Blade multiple times in succession, the ability deals extra 25% damage with a 100% bonus maximum. When sweeping blade is casted on a target, the target will get marked for 10/9/8/7/6 seconds. Yasuo cannot use Sweeping Blade on an enemy that's already been marked.
+ Use Sweeping Blade as a gap closer.

LAST BREATH

Yasuo teleports to a nearby Airborne enemy champion. Upon arrival, he suspends all airborne units within a 400-radius of his target in the air for 1 second while 200/300/400 (+150% bonus AD) physical damage them. Once he lands, Yasuo gains 50% armor penetration against his enemy's bonus armor for 15 seconds.


Last Breath is a tricky skill. You only can only activate with your Steel Tempest hurricane or with other Teammates. But use it at the beginning of Teamfights because you need the armor penetration. EX. Janna's hurricane, Vi's ult, Anything with a knock up.