Out Of the Abyss

You secretly join the revolt. You do your jobs flawlessly and slowly build your arsenal up . A dagger here, a mace there, until you have enough weapons and armor to plan an assault. You wait until nighttime to plan your raid. You could try to take control of the compound's towers as your men have bows as well meele weapons. Or you could storm llvara's quarters and try to kill her and her junior priestess.