I went and updated my riven sword model to give it the characteristic runes.
To do this I went back to my albedo maps and painted on the rune details using my reference as guidance, I needed to adjust this with blender open just to make sure I got the runes in the right place.
With these done I then made a quick emission contrast map so that when I added some nodes it would only be the runes that would glow. Then I imported these into blender, added a mix shader and an emission node, connected it together and turned on bloom. With this my sword model had its nice green glowing runes.
With this update I re-rendered the animation, and it looks a lot better even with its flaws.