Materials workflow with Destiny stuffs

Basically, how do I achieve this? Top is a basic bitch cycles view port render with a basic PBR shader on the tiny ripped Destiny armory textures. Bottom is a super idealized render from the ingame grimoire. I know I’m not gonna get magic with a low poly model and itsy-bitsy textures but I know i can do better. Not super tuned in to the various PBR workflows, I’m guessing that this is a metalness workflow with some kinda Object space normals? Probably wrong though. But yeah, thanks for any suggestions on what to do with the textures.

https://s28.postimg.org/i5a6zxemx/notevenhawkmoon.jpg

Imgur

attached is the model and texture files for poking around in: Heckmoon.7z a.pomf.cat/nedfzz.7z

So you can rip from this site? Thank you for this, I guess it’s the best we can get until we open the game files.
Did you have any luck with the shader or are you still having issues?