This is a vayne jungle game. This is actually viable.

(First guide so is ugly sorry)

Just build what i built but in case of a Master Yi drop fire cannon for ZHONYAs and inside of a team-fight when master yi uses the alpha strike ability (The dash that makes him invisible) Pop zhonya's

In case of a champ with hard cc eg veigar, when your cc'd just use mercurial scimitar instead of fire cannon to leave asap

PROS:
Good Damage
Ganks when invisible after LEVEL 6
Every 3rd attack SHREDS enemies
Good tower dives with the roll
Insane level 1-3 comparing to other junglers

Cons:
Squishy AF

Press the attack: Makes the passive on your W INSANE.
Triumph: Gives you good sustain in 1 v 2 situations.
Legend Alacrity: Lets you crit more often and get 3 attacks off quickly
Coup De Grace: Good to finish kills

Celerity: More damage in general
Water Walking: Makes river fights and escapes amazing

Sit in the back, if a enemy tries to escape pop ult and roll after them and roll out, try to hit whoever is closest too you giving you the best positioning

Blue side:
Blue, Gromp, Red, Gank.

Red Side:
Red, Wolves, Gromp, Blue, Gank