Very cool piece, you really went from super joyful to something more and more Epic, I like the arrangement and chord used. I think for the finale when you start the "orch hits" playing the down beat I would've like some variations, probably on the strings playing some arps or a different runs to keep the climax going even harder. The drums can probably hit even harder than this especially on the kick, the toms are fine, a bit more panning would also help getting things even wider.