It is great points made by CC, though I've always been firmly in the "fire and ruin" camp. I think Som makes a great point also, that most are already aligned with the Vile and you wouldn't want them on your side. But, how many are for the Consult simply because of Nin'Ciljaras being the Nonman King? What I am saying is, are a bunch of them going to be like, "Yay the Consult stooge is dead, glad I don't have to play along anymore.". Or, are they all Erratic and were truly all-in with the Consult's plan? I think Orinaral says that there is only a dozen or so that's Intact, so I think the odds of flipping the Erratics sides is probably a waste of time. Doesnt Serwe even comment that Ish is held by the Consult?
1) She's still wearing the collar, one that is crafted not to merely inflict pain but that also kills. Sorcery isn't on the table as long as it is on.
2) All the Nonmen are damaged. They are so damaged in fact that the son of their most hated traitor who was openly wearing the gifts of the Consult was allowed to become their king. So she's going to have to deal with Nonmen who accepted the rule of a Consult ally as well as Erratics and the violent passions of the Tall.
She's going to have to wrangle the whole damaged group, a task which requires some kind of superhumanely perceptive and persuasive genius. Oh wait, that's exactly who Kellhus sent. With an added bonus, she has the best "make the enemy come over to my side with music" chops this side of Macross.
I do agree that this is going to be the death of the race and at her hand, but not by her sorcery. She will lead them against their hated enemy so that they can reclaim a sliver of themselves and extract vengeance against those who murdered their race.