True Damage ignores armor. I suppose this means negative armor as well. So regardless of the armor rating, Corvus will always hit equally hard in all fights. This is true While he has TD, all armor modifications are useless.In other words: Armor Breaks only increases damage outside his Crit Phase (no charges = no damage) I have to assume that Resistors don't count as armor for TD, so it has no effect on them. The Resistors decrease damage while the Armor Breaks don't modify the damage, resulting in lower damage output.
These are passive resistances (look at the icons: not buffs) . I don't think it TD ignores those.That might not be the intended interaction, but that's the only explanation here.