work in progress...
1. Add some of those deep chimes (the metal pipes that sound like grandfather clocks) - add's a bit of "epic" flavor in there
2. you need (more) strings to "float" the transitions across - try long, deep chords
3. Spice it up a bit, it gets boring after 20-ish seconds
4. (optional) ad some choir into it. Look to Star Wars Episode I, the darth maul lightsaber battle lol...
Good luck!