The speed cap for Yi is 117% with Ulti Active.

Runes from heaven.
3x Malady... ehhh... I have no idea how could that TMDare give a +1 on this.

ok build is not bad at all the only thing is that you are way ever the attack speed cap the attack speed cap is 250% you ar at 275% with yi you dont even want to be at the cap because that makes hihglander inefective you want to have around 200% attack speed so you can get the max benefit from highlander so i would highly recomend taking away your attack speed runes and putting in damage or armor pen runes and maybe even traiding in a malady for a blodthirster not a bad build could use some improvments though ill go ahead and plus 1 anyways =D