Just watched a vid this very morning. Can't find the link and can't remember the guys name. Maybe Trophy Gamer or something like that?
Priestess - let her knock you out and lock you up. A mystery character will come and kill her and release you.
King Bugbear - invisibility potion then then shove him into the chasm. Another invisibility potion and run out.
Minthara - agree to kill the druids and open the gate etc. Then as she walks off to ready the goblins, she crosses the bridge and you hit the bridge support with an arrow and she falls into the chasm.
But then you lose 2 tadpoles.