Very nice!
This piece is pretty awesome! I will review the whole thing. I have a pretty good idea of what you did and what Supersteph contributed, but it is easier to look at the piece as a whole. Nice texture, good sustained momentum, good build! Now for the review. :-D
Alright, mixing is important, and something to work on. The piece came off as a little disjointed, and most of that was because the levels on your instruments were a little off. Mixing is a tough thing to learn, but it will come with practice. Here is a good example: when the double bass section comes in at the beginning, it grabs the listeners attention, and when the cymbal comes in, you get all excited for what comes next. You expect something like what happens at about 1:00, but instead, you get this kinda quiet piano. I love the piano, but it throws the build off a little because it is so quiet, and the cymbal is so loud.
Now for the melody. Being able to write a good melody is essential, and it is very hard to teach. You seem to have a good melodic sense, but you might want to focus a little more on form. First, you seem to want to keep it changing all the time, and to have every instrument playing as much as possible, at least towards the end. This is a habit that is very common, but makes for muddy music. There is nothing wrong with a melody that repeats itself a number of times. Actually, it is usually suggested. Don't worry, we won't get bored. For instance, from about :58 to 1:40 or so, the marcato strings play something like 5-6 themes, one after another. This is just confusing, because we can't figure out what you are getting at. One or two themes would have worked just fine. You'll get a better sense of this eventually though.
Alright, now the instrumentation. Good job! I like your choice of instruments, although I think it is a little odd to have the only non-orchestral instrument be the drums. Not bad necessarily, just something to think about. They were very effective though. You had good use of the sections up until the main theme came in, at which point it might have been beneficial to share the themes with some other sections.
Overall, I really like the piece! I really only review things that I think have some major potential. You're doing well! And you can take all of this advice with a grain of salt if you want. You're the artist, do what feels natural to you. If you have any questions or want anything from me, feel free to shoot me a pm at any time. Again, great job, both of you!
5/5, 9/10