As others have said, the orchestration is really great. I especially love that chord progression, definitely nails the "gearing up for a final challenge" vibe. The saw wave parts do sound a little jarring in context, but with some processing to make it less harsh and some transitional textures (white noise, reversed cymbals, etc. whichever works) in and out of the sections I think they'd fit right in and add a ton more to the overall story of the track. Great stuff!