Does Black Cleaver Kayle work?

Black Cleaver only applies to the physical damage portion of kayle's autoattacks. This stays true even when her E is active. I personally don't see it being effective on kayle because it forces you to build more physical damage on her kit to synergize with the black cleaver. Her Q and W will fall off due to the lack of ap. If you're building black cleaver to provide more armor shred for your team, keep in mind that her E only makes her autoattack have 525 range and it lasts 6 seconds which isn't alot of time to apply full stacks of this item.

I would consider it if you need 20 CDR for the cap. I looked it up with max CDR she can have her he active until she runs out of mana.

Also, I didn't now the splash damage adds a decent amount of AD damage.(+ 20 / 25 / 30 / 35 / 40% AD). Definitely viable if the other team is prioritizing MR.

On a side note: I hate playing against this champ.

Black Cleaver + witts + + runaans + kayle passive = lots of shred for your team.