So let's just review these "Lalaith Saves The World And Lives Happily Ever After" scenarios of yours shall we,
Urwen?
1. Lalaith saves Niniel from Glaurung by distracting her.
REJECTED.
2. Lalaith drugs Glaurung.
REJECTED.
3. Lalaith proves she didn't kill the butterfly.
REJECTED.
4. Lalaith double-crosses Morgoth at Dagor Dagorath.
REJECTED. Twice.
5. Lalaith gets Beleg to marry her.
REJECTED.
7. Lalaith kills Glaurung "in a second". Somehow.
REJECTED.
8. Lalaith kills Glaurung by dropping a rock on his head.
REJECTED.
9. Lalaith rips Glaurung's backbone out with her bare hands.
REJECTED.
10. Lalaith plunders Nargothrond and uses the proceeds to change the past. Or something. Somehow.
REJECTED.
SCORE: 0 OUT OF 10.
Pending:
Lalaith puts lizard into Morgoth's cushion. For some reason.
Lalaith persudes Niniel to marry Brandir instead of Turin.
Lalaith sails into the West with Beleg, Turin, Niniel, Brandir and the geese.
I'm really looking forward to seeing you tackle that last one.
