... I like how the guy on the right looks like he's pointing something to the guy in front of him, who is in the process of stabbing him. And the three guys in the center look like they're chatting. Apart from the fact that those five don't appear to be fighting very enthusiastically, it's a nice piece with a balanced composition. I also like the sky and castle walls a lot, they look like in peaceful times they can be very scenic.
Thanks! Ye, now that I had some time distancing myself from it i think what might be its major flaw is how static it all looks. Some motion-blur and dirt/blood flying might do the trick And the guy with his guard down does look a bit out of place in the middle of the fighting, I'll need to do something about him as well