So this is my take on master yi. He has so much base damage from Wuju Style and attack speed from highlander, that it's really fun to slow people to a crawl. (Both attacks and movement speeds). This is a tanky-dps hyrbid build, I don't recommend it for ranked or serious play, but it is quite fun. If I get enough likes or whatever I will make a full guide. But essentially, you jungle and gank. Then pick off squishies to proc your refresh on highlander.

I don't usually use highlander for initiation if my alpha strike is on cooldown. Alpha makes for easier chasing.