I pickpocketed them all, including the Prince for the key to the treasure room, completed the quests, returned and then killed them all. I ended up with 3 ropes, numerous orbs and lots of EXP. You can do the same in the Underdark hehehe. Now where's Charlie, I have a 3 for 2 offer on some magical rope, used only once...

...my mind was made up after i talked to the Prince and accepted his offer, i started to leave and then i looked at the dialogue box and what do you know? ...the Prince had hurled the Priestess and the other guy down the hatch to the Underdark...the Priestess had just said that they were looking forward to the peace i could bring...Treacherous fish people deserve to die!!!!!!!!