Tread lightly.
Sprites are very limited in what they can do. It's actually much easier to make a good stick movie that would outmatch the sprites. And some people take the stick to a whole new level(See castle series for reference).
But if you are going to stick with it make the fight scene faster. Make they guy have less vertical and more horizontal jumps and give a little more attitude to the mages spells. Like a bit of aftershock following through the spell. A bit of energy coursing through him and outward during the casting. I know these are now new design ideas but sometimes the tried and true work better.
Since this is an unfinished product i can't really vote on it. But out of good heart I give it a ten since all the technical work was done well.
Good luck... And damn Eesti needs to shut the f*** up.