I tend to project myself into plot-driven novels, imagining what I would do or say if I were in the protagonists' place. That's largely an exercise in futility in the Covenant novels, since they're so character driven. "Well, I'd decide the Land was real and blast them with my ring!" rather misses the whole point of the redemptive path the novels take.
The most recent book seems more plot driven, however, so I'm left thinking about what I would have done in Linden's place. And I think one of the first things I might have done in the Land is spoken Nom's name. The raver-consuming Sandgorgon is presumably long-lived enough to have survived to the present day, powerful enough to give Linden options, intelligent enough to give her another perspective on the Land's troubles, and presumably grateful enough to be of some help.
There's risk involved, of course. Nom may have reverted to a more savage state. If he released the other Sandgorgons from the Doom, he might be the only force restraining them from wreaking havoc. Still, it's a lot less risky than playing games with the Falls and the Law of Time, right?
Spoiler
Say...if you were a Sandgorgon, would you wonder if Demondiums tasted like Raver?