Nick would definitely go the "attempt to help Glacius fight it," but Carlisle is more likely to be moral support, given he has lots of feelings regarding how he views himself and what his deeds make him. It's not much of a stretch that he'd get where Glacius is coming from with that. He'd also probably want Glacius to have to fight it rather than... you know, compelling him to do it, since that's a big no for him, so Carlisle would definitely have his reasons for wanting to encourage Glacius to handle it.