I don't like speechifying, but here's what I've got so far. Huh, "speechifying" is actually a word, and I apparently spelled it correctly on the first try. Go figure...
[X] Plan "The truth will set your free, but first you must bend the knee."
-[X] "My companions and I came to conquer Westhaven, for the practice of slavery and the many barbarities practiced by Tyrosh are no longer acceptable among the Stepstones. If the plan had not been interrupted, even now I would be announcing that Westhaven had been peacefully taken under the aegis of Sorcerer's Deep. Those who wished to return to Tyrosh would have been allowed to depart, as I have no interest in making slaves of men. Alas, the foul god Zagreus, Lord of the Harvest, but also of Madness and Debauchery, saw fit to cast Westhaven low. The wine meant to celebrate him was instead used to spread an unholy madness, then inflamed beyond all reason by the Handmaidens of Excess, Zagreus' Chosen."
-[X] "Know that the Handmaidens are no more and Zagreus' ill deeds will not go unpunished, but there is much work to be done before we rest. All those slain in the night's madness must be purified by flame, else they will rise once more as flesh-eating monsters."
-[X] Once the cleanup is finished, welcome the survivors of Westhaven into our domain.