It works
While listening to this I pictured a battle scene from the game Aveyond and it really does sound like battle music! Not much to say for 14 seconds but here it is anyway.
What you have now works very well as long as more comes afterward. This alone being repeated wouldn't work very well, but obviously you know that since it's a WiP. I think you should make some higher instruments have a part later on to make it interesting. You could make another melody later on or keep this one with different instruments, either way would work fine. Lastly, maybe a little faster, maybe.
The backgrounds were really good, as were the percussion and pretty much everything else. Again, I wouldn't change anything that you already have except maybe, just maybe, the speed. The short blasts were a nice touch that I think totally make this work.
You, sir, know how to make battle songs. It could work in any game I've ever played. Nice!