This is a build me and my friend Nooooch experimented and came up with for Jungle Yi.


Welcome to Ryuzah's Master Yi jungle build.


Character Description:
Master Yi is an excellent jungle who has good jungle/laning and ganking ability but in this build, we will be player him as a jungler. He has great mobility and can move around the map quickly, kill minions quickly and not to mention kill champions quickly. If Master Yi is played well enough, he can easily and effectively carry teams.


Pros & Cons:

Pros:
- Quick Jungler
- Great Attack Damage
- Very fast
- Easy to farm with
- Good ganking ability.
- Easy to play

Cons:
- Squishy early game
- Low HP pool
- Getting exhausted may be very harmful
- Without ult, harder to escape.


Ganking Skill Order:
When ganking lanes, open with Alpha Strike on enemies that have no escape skills to ensure easy damage on them. If opening on an enemy with escape skills, wait for them to use it and if they are in a spot where you can alpha strike them, do it. After alpha striking, enable your E to boost your attack damage and make killing faster. To make the kill even quicker, enable your ultimate once you have it.
So Alpha Strike > Wuju Style, Highlander.

CORE ITEMS:
With my build, core items include

What order to purchase them, and why?:
When jungling, open with a Vampiric Scepter rather than Cloth Armer x 5hp pots to save money.
Once you have enough money, go back for a Wriggles Lantern.
The Next 3 items you want to aim for are Berserker Greaves, and 2 Zeals.
WHY?
The Wriggles lantern will make jungling a whole lot faster, and the berserker greaves and 2 zeals will give you massive movement speed and attack speed while your Wuju Style grants you enough AD for now. The Double Zeal will allow for good ganks with easy kills as the outcome.
After your Double Zeal, turn one zeal into a phantom dancer for further stat boosts. Follow up to buy a Infinity Edge for big AD and Crit damage. The Infinity edge after the Double Zeal will work well as your zeals give you good crit chance to support your infinity edge.
After your Infinity Edge, finish your other Phantom dancer for an even bigger stat boost :D
Finally, finish up with 2 Bloodthirsters, selling your wriggles for your second one at the very end.

This is a fairly Glasscannon build, but with your wriggles and bloodthirster, at the end you will have enough lifesteal to tank multiple champions at once.

Other Good Items
Other Good items to buy are:
Frozen Mallet
Youmuu's Ghostblade
Banshees Veil

All these depend on the enemy team.

Conclusion:
Remember, DOUBLE ZEAL! This build works exceptionally well throughout the game and the only downside is the low hp pool. Once you have your bloodthirsters, you wont need to worry about hp :)

Credits to Nooooch.

Please leave feedback and let me know what I should add to the guide.