hmmmm
I'll ignore the dodgy attempt at a biblical representation or the use of biblical themes and go straight to the song.
For a battle of gods and demons, especially armaggedon you need a lot more in a song then this to really capture epic. You had a decent idea, but it fell flat because of the following reasons:
You probably busted the decibel range on your program so the drums sound supressed and they cause the song to fall flat.
How many violins did you use? Too few anyway, for epic you need HUNDREDS of instruments, or heavy control of the instruments, that means lots of articulation, crescendo and the like. You really need to pull out the feeling behind something, and that often takes more skill then most people give credit for.
Choirs are an excellent idea but you really need a lot more bass then what you had, something ground shaking, rumbing, thundering in our ears. That especially goes for the drums, make them thunder, those ones sounded like cheap twenty dollar drums amplified a whole load of times.
You need more instruments and more control over each instrument section, ie weave them in and out of each other, epic is complex, thus the epic songs also need to be complex. This one's far too simple.
Some of those instruments were mildly annoying with the length they went on for in a sustained note, I'm not sure it's possible to make a violin sound on one note for 30 seconds and it sounded jarringly unrealistic, it really grated on my nerves.
I couldn't pick out the Gabriel section, there wasn't nearly enough contrast or feeling or the sense of loss as a being of unimaginable power is struck down.
The choirs need to be less sustained, use more stacato, shorter notes, hum haaa, hum hum haaaa, sort of thing not haaaaaaaaaaaaaaaaaaaaaaa onwards to infinity, and punctuate the notes with drums and short bursts of violins, chellos and other strings.
You don't have any brass! Where's the brass?!! Where are the brazen trumpets?!! The earthquake trombones?!! The horns? The Saxaphones? You can't do an epic piece like this without some sort of bass brass in there.
And finally, you need to work on the intruments, they sounded tinny and unrealistic, you should look for some proper instrument packs.