User blog comment:Care Level/Let's design champions!/@comment-4986183-20130822022118/@comment-9593635-20130824195902

For a realistic build, with BotRK (I'd almost call it necessary, since fury builds on-hit), PD, IE, Black Cleaver, Zerks, and GA, we're looking at around 320 AD and 260%-damage crits damage crits; so we're talking ~105 true damage on a normal hit and ~270 on a crit. Considering that most tanks that have strong armor also have strong health, we might be doing ~5% of their max health (we're assuming 4k health) in true damage on a crit.

I wouldn't call that outrageous for a melee champ.