Hello, and welcome to my Master Yi build. I did get a idea on yi, every body does buy pure DPS ( some few ppl AP ), but if u buy jusy litle dps, and mutch tank would me amaszing. Yi is a champ that u get pretty mutch dmg and attack speed just for lvl. So farm mutch and lvl fast.

The first thing u buying is a (Infinity edge) ( i love crit ), so i play with crit runes to.
(Greater Mark of Malice) X9
(Greater Glyph of Malice) X9
(Greater Seal of Malice) X9
(Greater Quintessence of furor) X3

I dont use to play like this, i use to play pure DPS, but i did try this yesterday and love it. U Get over 200 DMG and then play tank, and quit all with a (The Bloodthrister). That 2 dmg itemes + (Wuju style) + Ulti = veeery mutch dmg.

1 thing more, depends on if its more ap champs or more dps champs in enemy team you buy (Force of Nature) or (Tornmail).

(Ghost) - Very good combo with ur ulti

(Exhust) - always nice to have, if u vs a dps or need to slow enemy.