Fast pacing and getting in the details you want are the bane of each other. I think you did a pretty good job with balancing them both though. And with getting Riven's thoughts through. Which is, of course, always important. :) Any more description will probably slow the pacing too much to keep the action flowing, at least in the actual fight scenes nearer the end. But I don't think it needs anything more there or in the beginning either. 

Sir is quite happy she dealt with the other man for him, and is now wondering if he should save her. :P And if Taula needs saving... Speaking of, how close was Taula to Sir at her jumping off the wall point?