I think Last Whisper will be a good choice. You need armor penetration, and you do not need a second infinity edge. I like this build overall, it gives a good account of abilities and items, only lacking in more explanation of teamfights.
+1

Alright thank you guys for the insight. I'm still learning things myself so the feedback is appreciated. I'll make sure to come back and revise the data later. For now I'd have to say Last Whisper or Madred's Bloodrazor are a good replacement for the second Infinity Edge

Two things, two Infinity Edges is COMPLETELY cost inefficient. The reason people get it is for the passive, but the stats are nice too. Instead you should get an item that helps shred armor/healthy champs. I would recommend Last Whisper, Black Cleaver, or Madred's Bloodrazor.

"Stacking two Infinity Edge is merely adding more power to you swings." smh. obviously has o idea about what the bolded UNIQUE PASSIVE means.

And I agree with the guy above, use Alpha strike first to close gap and then activate your Wuju.

2 Infinity Edge are useless, might as well add a phantom Dancer, get rid of the lantern and get a Bilgewater Cutlass that also has a "exhaust" built-in that you can activate once every minute. You wanna be as fast as possible so they don't have time to focus you especially when you are backdooring their support. You want to be Master Yin and out.

Alpha Strike doesn't scale off AD or bonus AD or Yi's attack damage, therefore activating it before Alpha Strike just reduces its uptime.