Hello, my gamename is Ganneloth and i main Yasuo pretty long. About 300-400 games as him. I tried many custom builds and i found one universal which can be just little changed depending on conditions. Its sweet champion with amazin ultimate combined with knock up champions like Thresh, Blitz, Malphite, Vi, Wukong, Sion... Huge mobility with E and nice passive.

Straight. Yasuo is a paper earlygame. You should poke with E+Q -> E back combo or just farm by tip of sword Q if you are in trouble and enemy is melting you. After you will get Statikk Shiv, the game radically changes. Doesnt depend if you have 3-0 or 0-3, Statikk is Statikk. You should get boots ASAP (against AP Mercury, against AD Ninja Tabi or if you have lane without problems then Berserker Greaves which reduce your Q cooldown. Rush Infinity Edge for massive meltdown. Enemy will just stay and think: How the hell did he kill me? You should roam some lanes to get advantage early, then carry.

Yasuo is excellent at all game phases. If enemy team has tanky potential - rush Last Whisper, if not, rush Bloodthirster or Hydra, I personally think that BOTRK is rubbish. Yup, it has a awesome active but I prefer raw damage than this.

This is the phase where is Yasuo getting his best. If you have Boots, BT/Hydra, IE and Statikk, you have enough power to stop even much fed champion. Depends just on your skills. But Yasuo is able to blow away overfed champions. Just keep always your shield on, slide and slide until the world won´t end. But also think on your way back through minions and keep few free for getting back to your turret. That is for every game phase.

I just hope that you will enjoy this awesome champion. All you need is to train playing as him. He can melt down every champion even tank when properly used. Has gamechanging ultimate with awesome 50% armor penetration - you can destroy full build tank! Only three things that hurts him a lot - Thronmail!, Frozen Heart! and Randuin´s Omen Active. Sometimes if you get Rammus with thornmail build, it´s called Kill yourself, Yasuo. There is mostly not a potentional to kill him, just to kill yourself. So go, make 6300IP, buy this sweet champion and enjoy playing him! Good luck at fields of justice!