Compelling, but much more with realism...
I've got to say, you have a beautiful concept of a epically fantasized song, and the first parts really drew me in. Somehow, I see it themed to be something adventurous, hence "First Fable", as well as sorrowful... Or maybe something that sums up as "epic", as how you mentioned it? :)
It's a wonderful piece, but I only hope you could work on a real orchestra with this. As I have said, you have a beautiful concept of this song, though it's probably just me, but I would prefer you use real instruments.
Hope you don't get me wrong; it's a great song, and very compelling, and I pretty much understand that rounding up a whole group of musicians could be tough, and I could really see the effort in this and its potential.
So, 9/10, 4/5. :)