You ever tried to work Sword of the Divine in as a first item? Its only 2400 and its active ability gives you 3 free crits. Maybe im crazy but it sounds like a wet dream for Yi's early game

What to do about teemo q?

You can also use lethal tempo with Yi, is better but in some cases you can use conqueror too, but is best use more attack speed than damage, also is important to reset the AA with W, that is very important cleaning the jg and also in fights, is nescesary to know it because you can kill someone quickly and not die in the process.
Another important thing is trying to avoid de enemy CC or also change some runes to have more tenacity (this is escencial with de CC now a days).
Lethal tempo going top is the best opcion in most of cases, the important thing is reset the Q fast and dodge enemy abilities. I hope helped everyone.
I will made a guide of Master Yi when I have time.

WAOOOOOOWWW BUGA BUGA UGA BUGA UGALA BU

Dude
should i take eyeball instead of taste of blood in jungle?

Thanks!