As a huge fan of Nier, I completely understand what you're going for. I've yet to hear any soundtrack that is as well developed and just so incredible as Nier's, however, this song you've got right here is just amazing! I've played a great number of games with such epic boss battle that I honestly wish this played in. In fact, a game this song truly makes me think about is Musashi: Samurai Legends from the PS2, pretty epic game if you got past the lightning bolt hair :P But anyway, Based off of this, I cant wait for the 2.0 :) This is just awesome on so many levels.
10/10? No. It's power levels... They're over 9000!!!
xD Amazing Job, Keep it up!!!