A little while back now you made this little post Celeglin and it got me thinking.
And Galadriel didn't have nearly as many outfits as Arwen in the films, so I doubt I'll make anymore variations for her... Unless...
As I'm sure you are well aware there is one other significant outfit of Galadriel's, the one she 'transforms' into when she declines Frodo's offer of the One Ring and says her "In place of Dark Lord you would have a Queen" speech. It consists of a female steel-looking breast plate and a tattered robe or dress of dark greys and blues. Her skin also goes a dark blue and grey colour.
I'm sure you know exactly what I'm talking about but I went off and found some images that may help you before joining, however I'm not sure whether it would be wrong of me to post links to them because I or tbe boards don't own the copyright to them (from the rules set out before you register). Anyway, if you could tell me otherwise or wish me to send the links by PM instead then just say the word.
Also, I wouldn't have expected you just to add the other outfit in without any reason, because you're more intelligent than that and would like to find a reason for adding the new skin. Whereupon I thought that you could modify Galadriel's Light of the Valar capability to instead change her skin to the new outfit and perhaps increase her power and defence a bit, but reduce her speed (so the power could be used as a last resort and not so the player could have a huge tank for a time) for the duration of the power, and at the end she could revert back to her regular outfit.
Then this made me think that this might be difficult to impliment and instead you could make the power a 'forced' toggle, so once the duration of the power ends Galadriel could be frozen and unable to do anything and thus vulnerable until the play untoggles the powers effects and makes her regular Galadriel again. I have no modding knowledge so I have no idea whether or not this would be possible, but I think you want to make this mod the best you can and this element of the lore could be added to the game. Of course the name may need to be changed.
I hope you consider this and if you want those images just give me the word and I can either post the links or send them to you depending on what is allowed.
See ya' 'round,
Flying Snow