Dai Grepher the game is clear Duncan was not in the castle for you he was there for Ser Gilmore which imply that his travel to Highever is justified even if the HN did not existed.
I agree that Highever is the most likely place for Duncan, thus the human noble fits the story best. This is because a local bann held a tournament in Duncan's honor. The HN was at that tourney. So was Ser Jory. Duncan recruited Jory and likely also noticed the HN as well.
If you ask Duncan about what happened to his plan to recruit Ser Gilmore he states that in truth the human noble was always his first choice.
Duncan was not necessary because the HN did not engaged any battle in the secret passage.The castle was surrounded but not the secret passage,in this origin Duncan does nothing more but to blackmail you not save you like it happen for the others Origins.
Duncan saved Bryce and carried him to the larder. Which means the events would have gone differently had Duncan not been there. The servants entrance wasn't guarded, but there were still guards around the castle grounds. I doubt the servant's entrance led so far out as to completely bypass the soldiers.
Tell me the point in which Duncan save the HN?He does not do that that's why this origin is more justified in having resentment toward him.
I never claimed he saved the human noble, just that without Duncan there the HN might not have been able to get through Howe's soldiers. If Duncan is there, he kills some Howe soldiers. Without him, these extra soldiers might have joined the others and made all the difference against the HN.
That doesn't make much sense,if the Origin is selected the game play as if the HN is able to handle every enemy until they arrive at the kitchen so i'm not sure why they should be killed just because they were not picked by the player at least up to that point?
I explained this. Maybe the soldiers surrounding the castle would have been too much to bypass. Or maybe the soldiers Duncan kills in the castle would have caused Howe's forces to overwhelm Highever's forces.
Perhaps without Duncan there the soldiers he would have killed manage to get to Ser Gilmore before the HN can, in which case the doors would be opened for the main invasion force.
After that with the secret passage the HN is able to avoid all of the Howe forces since the passage bring this npc far from the castle and there is no fighting at all Duncan is no required and actually Eleanor told to them to leave.
We don't see any fighting, but that doesn't mean there wasn't any. I'm not claiming there definitely was, but there could have been.
Pretty much this,also i pointed out that there are concrete evidences offered by the game to say that every potential warden is dead minus the HN so it is possible that they did not existed or that they did went into another nation like Hawke.
Maybe the HN didn't exist, maybe he did. The only origins I think have an origin character who lived are the human and elf mages. If the Amell is sent to the tower, then the Surana was sent to a different Circle tower. And vice versa.