Neera's Quest (BGII:EE Spoilers)

Having problems.. dont read if you havent finished her quest!
Bug or tactic needed?
Can Lanneth die? She just casts invis and hides forever, everyone else is dead and theres one door which requires a key. Resting and returns just resets the fight and her spells before he just hides again
Bug or tactic needed?
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[Spoiler]I killed Lanneth and got into the prison behind her, but all the wild mages are hostile towards me. Is that supposed to be the case? I can't see why I'm supposed to fight against my former wild mage buddies.[/spoiler]
I shall have to try a less violent approach to that quest
is this supposed to be able to happen? because sometimes the people will attack me because they are under chaos and so i have to kill them because even after the spell ends they are still hostile, so i defend myself, kill them and my party rep goes down
And now I have a question myself:
EDIT: Never mind, she was just in that room in the back!