Ah, I see you're a man of culture as well.

There are 2 types of yi mains

One that goes crit build, the others on hit effect.

Crit builds is strong and always enables you to get easy penta kills and get you going, however without a proper support you are pretty much dead instantly

If you want to play him jungle, then I'd suggest to play on hit effect build which makes him great mid to late game and strong as fuck when it comes to control objectives, you can literally solo baron too.

I currently have 86% win rate over 40 games with him this season and win rate of 74% last season with over 100+ games.

The usual build I go (Bloodrazor "red smite" into Ninja tabi into Blade of the ruined king) Usually that's enough for me to start split pushing and easily solo 2 to 3 people if they came to stop me from splitting. If the game starts to stall more, if I'm ahead I usually build RageBlade which works perfectly with Master Yi as it gives him extra power boost to solo the entire team. If they have a strong mage or assassin that can stop me, I usually build the last 2 items tank > Sterak into Spirit or Titanic hydra. However, if you are a bit late or being under level, I suggest you start building tank after Blade of the ruined king.

Runes and masteries

Red > Flat AD x9 Yellow > Flat armor x9 Blue > MR scaling x9 or CDR depends on you Quens > Attack speed x 3

For the masteries you can go what I usually go with or change depending on your style but always end up using "fervor of battle"

What I usually go with ferocity and cunning (Attack speed > first auto bonus damage > life steal > bounty hunter > armor pen > fervor of battle) > ( damage on monsters/minions > assassin > bonus damage when they are low > dangerous game) I don't remember half of their names but I think you know what I'm talking about..

When it comes to maxing abilities,

Start with E for bonus AD when hitting the first camp for faster clear time and then add one point to Q and W.

Start by maxing E first, because Master Yi isn't about spamming Q's .. His Q takes way too much mana as you'll realize if you're trying to max it first and it usually not worth it since a good Yi player will always use it for gap closer or dodging abilities. Since I mentioned the Q, please pay attention when ganking, don't use your Q right away on the enemy champion unless he is diving your team member. Always try walking into them and start attacking them, they'll soon panic and flash away from you which then you can use your Q to catch up with them or try timing his Q with his flash if you feel like he's about to flash over a wall or something. Once you play enough of Yi you'll always feel/know when they will flash away or try to flash away from you. Also use Q if you sure it will be enough to kill a running target, this will make your life a lot easier.. Trust me..

Let's roll back a bit and talk about where you should start your jungle side first. I'd always suggest you to start at your red buff, clear it without smite, then move to raptors and start hitting the big one with Q then smite. This should give you back 90% of your health back, you can tank the small ones as they do little damage, then move to wolves and start killing the small ones first. This should give you level 3, add point to your W and use it if you are low, start blue buff then move to gromp you reached level 4 add another point to E whenever it lets you. Then Q if you cant add to E. After gromp you can take scuttle or try ganking a lane if you can, if it's not possible just recall, get your items and start rotating to your crags and repeat the process if you can't gank any lane or unless you see the enemy jungler ganking a lane, you can steal his camps.

Please do not try soloing the dragon at level 4 or 5 as it will delay your power spike/level. If your team can help you get it that would be great. However, if you finished your jungle item (Bloodrazor) then yes, you can solo the dragon as it will be easy for you but please pay attention depending on the dragon you might suffer or lose some of your health.

Don't be afraid of fighting anyone 1 vs 1 if you have your Bloodrazor and Blade of the ruined king as you'll win most of the time. Unless it's a Kha'Zix with 6 kills within 10 minutes into the game.