I would argue that if the requirement is "serve as a credible threat", Branlhune definitely counts. Especially with someone who can apply it so well. Just because I was absolutely against fighting the Ice Dragon doesn't preclude us being a threat to it....it's just the difference between a 5% threat and a 50% threat.
I would argue that a credible threat must not only be capable of even possibly winning in a fight against the being it is a threat to, but must have a significant chance of winning, such that a fight between the two could go either way. As such, while Branalhune allows for a relatively normal attempt at fighting the dragon (in the sense that rather than being completely useless you can make melee attacks against a reasonable amount of remaining armor, and it stops the dragon from buffing themselves into a relativistic avatar of destruction), it just lets a relatively acceptable melee character's two attacks against the dragon have a chance of doing something.
The dragon, however, has nine wounds, and something like a factor of three times more attacks than that? And it can breath fire, and cast battle magic, which, uh, we can't, we can just try to counterspell those, and hope our belt protects us. Branalhune is a threat, but I would not call it a credible one.
Why does this thread get so many Staff Posts? It's like clockwork.
It doesn't, but this thread is under a few weird phenomena that have resulted in a very odd... thread culture, I want to call it? For starters, updates are basically daily, and very large by the standards of normal QMs, even war turns (normal turns are monstrously large), so this thread pretty much never comes off of the post-update sugar rush posting.
Plus, there are hundreds of people who want to post, increasing the surface area of possible social interactions about the quest massively (by which I mean three active questers can have three interactions, but four can have twelve, and so on and so forth, and we have hundreds, so everybody's bound to have somebody to talk to about something).
Finally, everybody is actually excessively nice here. That may come as a shock, but every other hyper-quest I've been on has been a pile of salt compared to this one. Part of that might be the chilling effect of the no-tolerance rule by the mods, but I think it's also at least in part that a lot of the active posters have been in those other quests and we're basically traumatized. So we might get mod visits from time to time, and it looks sort of like the activity in other threads, but when you think about it we're pushing maybe a thousand pages a month and the ratio of good posts to problematic ones is insane.