[{quoted}](name=Jin Air Flow,realm=NA,application-id=3ErqAdtq,discussion-id=xBdLzGRx,comment-id=0000,timestamp=2016-06-10T20:43:22.484+0000)
....................................................... and I wonder why we're in the tank meta right now.
Don't let them fool you. Flat Armor pen is way more useful against Squishy targets. Against a tank, you would need to combined both Black cleaver, and one of the LW items. to Even remove half of a Tanks Armor, and that still scales with HP you buy.
Also, if your counter building the tank, your not building flat DPS, so if you build this on an ADC, you wouldn't be able to out duel the enemy ADC, who has built AS, and Crit chance.