There are 3 types of defense on almost every character.
Ignore Defense. Ignore critical resistance. Ignore physical resistance.
Before the release of Dark Revelation, we had only Ignore defense during that time let say I Scion(Cionx) v Zerk (Asterothx).
Scion: 60% Critical resistance. 450+ Defense. 85% Physical Resistance.
Zerk: 109% chance to hit 2450 Critic, 93% ignore Defense.
He made about 4k critical over me permanent during that time he had 109% chance to critic 2400+ dmg and it was 93% ignore Def and I had 80% Resis + 60% Critic Resis.
But when he Resistance debuffed me from the hit went from 4k to 10k because now my Resistance reduced from 86% to below 60s + his permanent ignore defense.
I asked him how much critic he makes on mob and he said 30kselfbuff, which is ignore defense included as always.
But now we have also ignore Critical resistance and ignore physical resistance, so all three combined Ignore Resis+Def+Critic Resis are criting a player is same as criting a mob because ignore Resis+Defense and Critical Resis means you have 0% Physical Resistance, 0% Defense, and 0% Critical Resistance which causes the huge shot nomatter how many party buffs you got Ignore makes it 0% except for Heroic Defense. So this is kind of unfair for once again for Casters. Obviously, Dark Revelation is the Era of Critics.
Also this is true that new set is buged, it ignores 100% just like during Heaven's Hell release Skill Chaos, Hold, Fear, Cower, Disease Success rate was 100%.