what runes/items should i get for yi?

rune-wise i've thought about all crit damage for a glass cannon.

as for items, i've tried phage first but it doesn't yield much damage and i find the slow isn't really necessary. bloodthirster->infinity edge usually works pretty well.

thoughts?

Armor penetration & Crit Dmg

Max armor penetration then crit dmg. Armor pene + items like stark and armor piercing items will let u kill any heros within 2 secs

definitely get crit. damage marks and armour penetration quintessences.

Seals and Glyphs get what you want, it's not really economically viable to get crit damage seals and glyphs as a crit damage mark is +2.23%, whereas the glyph is only +0.56%