I think I've mentioned before that I don't think mass death is the purpose behind the Ardors/Rejoinings. Too much of Eldibby's current game plan has been genuinely beneficial to our continued existence, and not in a way that makes it seem like we're being saved for some greater destructive purpose. Case in point: Darklander killed a primal. He should have no reason to if he is a) an ally of the Ascians and b) trying to destroy all life on Hydaelyn. There's something else going on there that we can't see from our current perspective because we're too busy putting out fires.