For a texture to look good, it needs to have both highlights and shadows. But your textures look very flat, especially that green armor for the Klyros. Compare it to the level of detail in the Klyros skin itself - the parts of the Klyros that show look very incongruous with the level of detail in the armor. (The black/gray armor is too dark - I can barely see what's going on in the torso.)
If you have different bits of cloth or leather sewn together, you need to texture in seams. There's no crazy glue and it's not all made of one piece, so you need to show how it all ties together. Avoid black outlines - they look cartoony and out of place. And for the Ylian armor, why would there need to be so many studs on the back? It seems inefficiently constructed.
The most important thing, still, is showing highlights and shadows. Look at the highlights and shadows on the loincloth that you've left alone, and look at everything else. You need to make sure it looks similar.