Help him.
Wait for more fluff afterwards.
I was hoping for very low rolls for us in the fight so Knighthowl could kill us and this story end in a nice, "fitting" way.
Because if we do not die there (which we didn't) we would become like this: shattered in our ways, got a goal we have no means of accomplishing (How in the world can we be a evil overlord without killing people and, you know, being evil? Or say we're not the regular "evil overlord" anymore, say we are "the last sane man in an insane world" that sees the disease in the system, how can we change it if we're not to kill or abuse something? What, are we beating people with a piece of cardboard until they say "Okay, okay, i'm not gonna abuse my position anymore"?
I would seriously think this game should be played not based on true good or true evil, but in the very naive way all evil overlords think: "IM GONNA DESTROY THE WORLD MUHAHAHA! even if afterwards there is no world for me to live in". But then again, nightshade himself said he was hoping for us to come to these conclusions.
Anyway, i think that we had our "disfunctional family" working just right. If we change inside (like we are doing) it will just not work anymore just because we are not the same guy who runned it.
I, for one, think the best part of the story is over. Now we have a lot more things that I can't see how will connect together. So, say they capture Cerulean again. We are no longer moraly able to kill hundreds as a distraction so the only option we have is getting Cerulean killed. Or say we are in a regular mission and the cops arrive. We can't kill them because they have families and what-not, so we can only run away. We became regular street bandits who can no longer change anything.
Anyway, i clap my hands, raise my glass to the awesome story nightshade mastered. I just can not see how can an evil overlord have morals. Standards are one thing, to not kill people without a good reason, to not be cruel, to protect what we hold dear to the end. Now morals, as in caring for our enemies i can not place in a efficient overlord.