Oh maaan~ I'm REALLY partial to Fenrir and Kerberos at the moment, but the Set essence is really nice too. Weather powers are good if a bit situational, lying would be apt (although permissions might be needed if they're used on player characters). Instead, pyrokinesis might be handy, and since he's the god of chaos and disorder, maybe Crona could have something like D&D's wild magic where he could cast magic but it might wind up with a random effect.

(Seriously, though. Ragnarok pupper or cake pupper with snakes.)