User blog comment:Krufix/Armor/Magic pen is anti health stacking./@comment-6906412-20130723200913/@comment-6906412-20130723210805

I never even considered BotRK or LW on Garen or Renekton or any bruiser/tank for that matter. Cleaver, though, is another story. BotRK isn't awful on Panth, but not a fantastic item either.

As far as the BotRK goes, the passive and active MAKE the item. BotRK actually has pretty mediocre base stats for an item of that cost, but the % damage passive's synergy with the AS it gives is just phenomenal against a tank line. The active gives a decent amount of burst and is really useful for self-peel and dueling.