Watcher's Keep outcomes by Alignment

I was wondering what to do with my LG Paladin, and realized I don't really even know all the possible outcomes. Killing the Imprisoned One is evil, since it sent back to the Abyss. What are the possible combinations and how should characters of different aligment complete the quest? Bellow is just a sketch to get started..

Lawful Good: Rad the Scroll; Find out you are trapped; End the Game there :) ??

Neutral Good: Read the Scroll; Find out you are trapped; Agree to tricking the Knights; Tell Knights the truth, let them go on a pilgrimage ??

Chaotic Good: Read the Scroll; Find out you are trapped; Agree to trick the knights; Trick them; Go after them to Rescue them, Kill Demogorgon ??

Lawful Neutral: Read the Scroll; Find out you are trapped; Kill Demogorgon ??

True Neutral: After Finding out what the Imprisoned One is, get out of the final dungeon and leave the Keep for good (leaving someone else to deal with it) ??

Chaotic Neutral: Don't Read the Scroll; Agree to trick the Knights; Trick the Knights; Go to Chamber to loot the Knight's bodies; kill Demogorgon (not sure this is even an option) ??

Lafwul Evil: ??

Neutral Evil: Tempt Demogorgon to appear; Kill It; Kill Helmites

Chaotic Evil: Try to Free the Demogorgon; It attacks you -> Kill It; Kill Helmites

Like said, I don't really even know the different possible outcomes, so without that it's difficult to try to decide what is best match for each aligment...