This... is the most incredible fight I have ever had the privelege to read in the world of books, scripts and fanfiction. Harry Potter's conflicts do not come close. Nothing does. Not even the battles of starships within the books of science fiction novels, nor does the literature of previous years bare a scratch on the epic scale of the scene.
The personification of swords was perfect. The characters were flawless, and Gilgamesh was portrayed as the fallen Hero that history made him to be, as well as the Fate/Stay Night canon's conceptualization. Although it is lacking in length, I have taken into consideration that this is a Fanfiction piece. i have no other qualms.
I pity the fools who try to touch you after this battle script. No one will ever come close, in my opinion, no one.
Kudos, to you. Grunt. Kudos.