Bandos Greatsword Design - Hardsurface Studying

I originally wanted to study hard surface sculpting, but went into creating my own Bandos greatsword design. (The blade is the same, just a bit more roughed up).
The sword is originally from Runescape 3
Maya - Zbrush - Substance - Marmoset Toolbag (Workflow)

Some parts could do with some TLC, but I didn't want to spend longer than needed on it.
Learnt a lot during the process, so if you have some, feedback will be much appreciated!

Blade Renders

Blade Renders

Hilt Renders

Hilt Renders

Sword Marmoset Viewer with Subdivision Triangles 400+

Wireframe W/Textures
 Just below 8k triangles(I believe I can go a lot lower, I forgot to retopologise the rings and lose some edge loops around the hilt)

Wireframe W/Textures
Just below 8k triangles(I believe I can go a lot lower, I forgot to retopologise the rings and lose some edge loops around the hilt)

Texture maps used for Render
16 bit Normals .Tiff
16 Bit Base Colour .Tiff
Grayscale Metalic/Roughness .TGA
Emissive 8 bit .TGA 
AO 8 bit .TGA
I'm still not sure about these map formats and bit rates, if you have advice please tell me. <3

Texture maps used for Render
16 bit Normals .Tiff
16 Bit Base Colour .Tiff
Grayscale Metalic/Roughness .TGA
Emissive 8 bit .TGA
AO 8 bit .TGA
I'm still not sure about these map formats and bit rates, if you have advice please tell me. <3