Many greetings and welcome to Modding Union! Unfortunately, I am no expert of coding and I thus cannot help you. However, whilst you wait for the coming of more appropriate people for the task, I really suggest you have a look at this major proposal of the forum, which I crafted almost two years ago and whose link I shall indicate below. It is basically a more structured transposition of your very core idea: allowing her to let her might loose, even if it is for a brief amount of time, mirroring the display of power that is shown in the Battle of the Five Armies (doing without that morbid motive, though). I'm sure you will be interested in the matter and, should you be convinced, just let me know this by assessing your feedback in the own thread. So far, it's one of the most popular concepts of the whole forum. I still keep my fingers crossed
GALADRIEL!
P.S. You're not the sole admirer of the Lady of Light within these halls, love