In te first some minutes just go and jungling for money and level.
Becouse Master Yi is going on speed we will need much gold to buy items for speed and damage.

When the beggin passed just now beggin the battle so its time to build master yi skills for PVP so activate Wuju Style for more damage.
If you want to PVP earlyer just dont activate the Meditate just at the finish.
The meditate its a really good skill but thet build is for team help not for solo kill.
So dont attack solo just if you have a team mate.
Becouse thet champion is a ninja try to play it like a ninja so attack when the ennemy is not around an enemy turret and attack from back when he try to escape from battle to survive.
If you can colaborate with team just make like thet when you have low HP in the midle of the battle 2 vs 1(you a team mate and 1 enemy)use Meditate and you can not get killed why becouse its give you a lot of armor and thinks what make your defense stronger and the enemy will attack you ... easy kill ... but if you activate meditate it make you stronger and when the enemy try to kill you, Your team mate atack him and the enemy will never leave an easy kill just too late and then the enemy try to escape use the Alpha Strike Wuju Style and your ulti if you got it and its a 100% kill !

So sorry for bad english I allways use thet build and I allways got like 16-25 kills and no deaths.

English failed sorry !