I definitely think we'll see a lot of secondary characters die, and among the main cast, I feel Perrin, Faile, Rand and Nynaeve are most vulnerable.

In fact, I expect Nynaeve to be widowed and then to die in a blaze of glory, similar to Eldrene's end. I remember Brandon saying that the main characters were basically in hell, during his writing, and for the EFers, at least, noting would quite cut it to the bone as their "protector" dying.

I'm fairly certain that soon after Merrilor, Nynaeve will lead a contingent of Aes Sedai to Tarwin's Gap to support Plan's defense of it. And a heroic last defense like the end of Manetherin is definitely on the cards. After all, Nynaeve is responsible for this army of merchants and farmers.