The Problem With Black Cleaver

Lord Dominik's Regards +50 AD +45% Bonus Armor Penetration for only the user of the item +15% Damage Against Champions with 1000 More Health Than You

Black Cleaver +400 Health +40 Attack Damage +20% Cool Down Reduction +30% Total Armor Penetration for everyone on your team after hitting them 6 times

See the issue here? Black Cleaver's armor penetration is better than the Last Whisper items in almost every way except that it is less burst oriented since you have to stack it first. What am I saying? I'm saying Black Cleaver will always outrank Last Whisper items with it's current design. It would have to give little to no attack damage for DPS champions to consider Last Whisper over Black Cleaver UNLESS they can't hit someone more than 6 times with any kind of physical damage tick. Black Cleaver needs an update. It is like the old Rylai's. It is far too global an item and the last tweak to it targeted the wrong part of it. It's too global an item because it's efficient against every kind of target and is efficient on every physical damage dealer that isn't some kind of Assassin that bursts someone down in 2-3 hits, even though even then the CDR might make up for that fact.