"Why is this build bad?" Game!

Hey everyone!

One of my favorite parts about league is trying to find interesting and odd ways for items to interact with each other. However, it can be hard for me to actually test the viability of these, quite frankly, odd and possibly really bad builds. So, I figured I'd try to make a game out of it (and this subreddit seems like the best place for it). So, I'm going to think of a build that has interesting interactions with a champion, and I'd like you guys to discuss why it's good or bad; the "Why is this build bad?" game! So, without further ado....

Shredder Kayle:

Wit's End -> Black Cleaver -> Lucidity Boots -> Runaan's Hurricane -> Defensive Item -> Situational Item. Top lane preferred (since you won't have the burst or sustained damage for middle lane).

The idea behind this build is to utilize Kayle's passive and the passives of Wit's and BC to make the enemy's tanks really squishy. Kayle's passive reduces makes her auto attacks reduce an enemy's armor and magic resist by 3% per attack, up to 15% reduction. Combine this with Wit's End and Black Cleaver's passives, and you have reduced an enemy's magic resist by 15% + 25 and reduce their armor by 45% (I think; up to 30% from Black Cleaver, and another 15% from Kayle's passive). Hurricane then allows Kayle to do this to multiple targets on the enemy's team. The rest of the items I see as being situational (although, you'll probably want to go for some utility or tanky items), since after the first three items, you'll have succeeded in stacking the resistance shredding items. Please discuss!