A questing ability is useful even on a character with only 1 . An attacking ability is useful even on a character with only 1 . But a repeatable defending ability is useless on a character with only 1 . And that's what I find odd about Coruhaer. His ability triggers after he defends an attack, i.e. only after the whole attack is resolved, which means he has to survive the attack in order for you to use his ability. But he has only 1 and 2 , so he's not likely to survive an attack from anything that you'd want to use his ability on. Especially when you factor in that the only place you can use him in is the Angmar Awakened campaign, and nearly all the enemies in the Angmar Awakened cycle have 3 or more and can kill Coruhaer in one hit. You'd have to put in extra work (like Stand Together) to make him do anything - and at that point, why bother playing Coruhaer in the first place? The tipping point for me is that all of the other boons that Coruhaer is offered right next to (Berelind and others) are strong all on their own and need no extra work or deck construction to get the benefit of. I actually started a discussion thread on BoardGameGeek about this card, and the consensus generally fits with my opinion.
Did FFG mean to say "after Coruhaer is declared as a defender", like Gondorian Spearman? That would have made a lot more sense given the two cards' similar stats. I might even play it like that despite what the card says, just so that I can try to get some use out of this otherwise-useless-looking card. Or maybe they were just being really cautious with what they could do with a 0-cost ally. It makes me wonder what happened in playtesting that Coruhaer ended up as useless as he is.
PS: I just realized that there are no continuous or boosts for allies in the core set or in the Angmar Awakened cycle. If FFG intended that we use Coruhaer by finding ways of boosting his defense (see my "update" below), it makes me wonder exactly how FFG intended that we do so. I also just noticed that he isn't a Warrior or Noble, so even if you go outside the Angmar Awakened cycle, you can't even put Raiment of War or Ancestral Armor on him.