Game of thrones duel illustration

[Patrick Gaumond]

Cant' say much about conveying motion, but i will say that I think you need something in the upper right region. Right now theres nothing there so it becomes very left heavy. You either need to move the characters around, crop the image differently or add something there ( a crowd, some other characters, buildings, horses tents) anything that balance it out better. I would personally consider rearranging your composition first

https://www.youtube.com/watch?v=CgXboIrbKec

^ That critters episode has two crits (first and last, the tentacle monster and the arena fight) that might be relevant for you, check em out and hope that helps!