Master Yi Build
Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
I play Yi a little strangely. I don't focus a single item right away, I get many builds started at once then complete them all one at a time. If you play smart and don't die early this Yi will become crazy good.
This is what I have been using for Yi lately, however I have invested more in the attack tree in the past and fooled around with the last ones in different spots it doesn't really matter.
This part is important. I start off with Doran's Blade and some pots. I then lane until I have enough for the Avarice blade and the start of my boots, if your lucky and did a good job farming complete the boots or sell the dorans and pick up the vampiric sceptor to replace it (not necessary to sell right away I just usually play that way.) Lane some more until you have enough for the occult blade. Once you get that start getting active on attacking champs, if you fail to get a few stacks on the occult blade by mid levels this build starts to fall apart. After you have some more cash purchase madreds and a zeal and start upgrading all the builds until you are maxed out. If you play well by the time you have a zeal you should be annihilating people behind turrets and such.