Hello Everyone! i am SamTabouretski and i am making you a guide for master yi. this guide is principally about laning and maybe jungling a little bit. Maybe it'll work for you, maybe it won't. It really depends on how you play master yi. I will not make a complicated guide but just about items and stuff. follow it has you will... i've made 24/2 in summoner's rift :P

First, i recommend Doran's blade. It will give you a little more damage and health.
Second, buy the Berseker's greaves. It will give you movement speed and also more attack speed.
Third, Buy zeal. More movement speed and attack speed.
Fourth, Phantom dancer. +30% crits chance, 15% movement speed and +50% attack speed
Fifth, buy recurve bow. +40% attack speed. You should now have around 1.7 of attack speed.
sixth, buy the infinity edge. +80 damage, +25% crits chance (start with the b.f sword =» pickaxe =» cape)(you may sell doran's blade)
seventh, buy a blood thirster. +60 damage, +15% life steal (you may sell doran's blade)
You can change the order of the items, like buying recurve bow before phantom dancer.
Or buying bloodthirster before infinity edge, if you want some life steal...
Do as you want! :D

In the skill sequence, you should start by upgrading alpha strike, because it makes you attack multible enemies from far and deals damage. next, try to upgrade wuju style aswell as highlander. i think meitate is not important, as it does not give alot of life regen and takes time to use (not in middle of combat). Highlander comes really handy when you are fighting and when you are pursuing a fleeing enemy. it gives 50% attack speed and movement speed for a short period of time.

So this was my guide. Though it's short, i've made alot of good games using this build. tell me in the comments if you would fix something or if you have suggestions to make. feel free to message me if you need something.
Thanks for reading!
SamTabouretski