Ok, so this build is a lot different than most preseason 6 builds I've seen so far because most of them have given up on the Trinity Force Yasuo build because of the changes to Static Shiv and Trinity Force. With Static Shiv now being 30% crit chance and Infinity Edge being 20% crit chance you're already at 100% Crit after those two items on Yasuo so we don't need the Trinity Force do we? Well I think we DO need Trinity Force in the build, every bit of the item except for the wasted mana synergizes extremely well with Yasuo's Playstyle and Kit. The AP helps your E do a little bit more damage, the AD helps your autos Q's and R's, the Crit chance and movement speed are your bread and butter, the Rage passive helps you chase kite and run away and the Spellblade passive adds 180 extra damage to your Q.

So in order to fit both IE and Triforce into the build and still have 100% crit chance we have to come up with 10% crit chance from somewhere, so your options are to buy a random Brawler's glove or just use 10% crit chance runes. I like the rune option because then you start the game with 20% crit chance and can up that to 100% VERY early in the game by just buying your Zeal and a Cloak of Agility on your first and second back. this is very strong in the early laning phase and can give you a suprising ammount of damage and sustain with the Warlord's Bloodlust Keystone Mastery. I've found that I can consistently have both my Zeal and Cloak of agility by 8 minutes into the game.