You are at a disadvantage when you have your back to the opponent in a real fight. Especially if he has his weapon drawn and pressed against your body. I will edit the post now - she will be holding the tip against Alevyth's neck, which at most is protected by a thin layer of chainmail.
Don't worry about the saves - the Listen check was high on impossible to get (i mean, there is a battle going on around you, and a screaming man right next to you.) The reflex save was not a conventional rule, but had you gotten a 15 i would have let you slip away at the last second and face her.
I have given brilliant energy some thought but lol, the undead would just love a sword that can't hurt them wouldn't they