"A day and a half! You've been busy.
If someone wanted to point an army at large-scale humanitarian intervention in Golarion I would generally advise them to try to close the Worldwound. It represents a substantial danger to the continued habitability of this world, it ties down a large portion of the resources and particularly the armies dedicated to the forces of Good and Law in the world, it's getting worse over time, and Cheliax provides the bulk of the forces combatting it, which simultaneously means the situation would worsen considerably if Cheliax were at war and those forces recalled and also levels their casters. And there would be less organized and coordinated opposition to a drive to close it, and it's safer to operate in a world with a lot of unknown unknowns if your enemies aren't coordinated enough to exploit them.
That said - the existence of a world and a magic system we were previously unaware of is a substantial advantage. Maybe enough to take Cheliax, if they're not forewarned. Probably not enough if they are. So it's something to think about but I don't know if I'm recommending it."