I think the Warrior of Darkness are not working for Ascians in general, but for Elidiibus. It could be Elidibus has a different agenda then his brothers and sisters. I too think they are the 1.0 heroes, why else make them look alike?

The Warrior of Darkness are adventures that for some reason decided to turn away from Hydelyn. We know from the Echo vision that at one point they were fighting against an Ascian. Maybe Hydelyns blessing failed them and they found a new blessing in Ziodark. Maybe Hydelyn is the big bad and we are fighting as the champion of the real baddie? So many questions.