I have covered the different outcomes of these two quests in my walkthrough in a table on page 143. Take a look if you like. The quest 'Slaves and Masters' is on page 142-143 and the quest 'Frederick's Blood Stone' is on page 123 if you like more details. The walkthrough can be found in one of the sticky topics on this sub forum (
Walkthrough for Divinity - Original Sin).
