As archmagicians, this question will always be uppermost in the players' minds: is averting an unpleasant global fate truly more important than demonstrating one's superior ability, flair and wit? After all, one must acknowledge that the Dying Earth will, at best, limp its way through but another century or so before collapsing into so much frozen rock. Perhaps, however, extending the Earth's existence will provide opportunities to gain status and soundly defeat one's peers.
Someone will win this game, earning an increase in status, regardless of the fate of the world. Ensure that it is you!