I like where you're going with this, but i don't think she'd specifically talk about how accepting fringe goblinoids would help The Dark One survive, personally i doubt that relatively small addition of power (From what we've seen, there are fewer bugbears then hobgoblins for example) would help a whole lot.

my guess is she'll end up being the goblinoid voice of reason that Redcloak listens too, even if all she's doing is repeating what Durkon is saying. the fact that it's coming from a goblinoid might just be enough. If Durkon tells her about it, she may be able to convey that the dark one wouldn't be able to survive the waiting period to the new world in a way that Redcloak would listen too, or at least consider. Granted Redcloak seems like the type to not believe this information if he knew it was coming from an enemy dwarf. so some secrecy on Durkon's part, or soul-searching on Redcloak's part may be needed.