What points do you need to get in the negotiations with Caladon to get the best cinematic (the one where there is no war or any bad stuff) I have maxed out intellegence, charisma, and persuasion so I should be able to do what is neccessary for the best ending.
As ong as you pick reasonable options in the dialog boxes, you get the happy movie. I've done the thing quite a few times and never got a sad movie. Of course, I completed the master quest and chose options good for everybody each time. The only time I didn't I got strife. I don't think an unusually high intelligence is neccessary, as long as you don't have "dumb" dialog options.