Dude... don't be silly. This is top grade stuff. Yeah.. flash animators may not be making money, but you can find a job with companies that do. I'm pretty sure you qualify for blizzard entertainment, or many freaking others that are on the same level of productions.... I am just getting into animation and what you are doing right now will take me a life time to learn, let alone actually produce.
I believe you can do it. I don't have a single doubt within me that you can't achieve this and damn near never am I wrong about these feelings. Trust your self, that is all you need. oh and you are absolutely free to use any of my music for anything you do, infact it would be an absolute honor if you did.

Use MoCap. Learn it and use it. It'll be fun than manually animating possible moves.

Not bad! I'd say though you could work on fluidity of movements a little more. Also, perhaps you should try giving different characters different styles of fighting or manners of fighting. After all, fighting is part of who the character is and in a scene where there's no speaking, the actions convey a lot about what a character is thinking or feeling.
Keep it up! :D

~Phyrnna ^_^

It was good.

Improvements- Make it show that at some point someone is definitely winning, or much better at something. Doesn't mean comebacks are impossible though. Most of the movements were fluent so I wouldn't be able to tell if any attacks were really landing besides the sound, but that isn't as effective. And just make sure to show the impressive parts as clearly as possible. If it isn't too clear, show it in slow motion.

I'm just a guy who've seen enough to know what works.

nice animation, I liked the smooth fluidness and the realistic background:)