User blog comment:Gerokrat/Darius rebalance/@comment-6048945-20140504154955/@comment-18470289-20140505050015

For what I understands of darius kit is that he was created to not only to be a executioner, but a mass or team executioner. But in lol we dont have some mechanics like instadeath(garen isnt instant nor darius dunk, cast time). So to create the the mass executioner theme they gated his execution move with bleed stacks. The problem is that post-early game no one in his sane mind would let you apply 4-5 stacks on them as they know that your damage is lethal.

In other words, they will kite you (same thing with huekaiser). So saying that you gonna ult some one with full-almost stacks isnt some realistic. And his sustained identity comes from his bleed stacks synergy with crippling strike cd restore.