With the uv finally helping with the render's i have 3 paths for the skin tone to match the new head skin:
Either bake the textures making all the pattern's for the cloth/armor's.
Bake only the skin tone and add a layer over the current ones.
Make a baked with norm map textures for the champion's and heros only.
Each one of them will require some time so we can have first round of addition of head's and later skins or just a whole update.
Dedicating precision and effort to maintain the current textures but with norm map's.
Or just make the skin + chest prop's like cuirasses and lamellar's. Rn i'm liking how the shadows look's on the shirt's and arm's giving a bit more of realism on the distance.