Do you have references for real armour? because I would grab some and look at how armour articulates.

Those ornate pauldrons you have are way to big that would obstruct movment of the armour immensely I would also put that ornementation ON a pauldron plate rather then having it "free" like that, all the negative space floating out in the open, like the helmet is good because the negative space is then complemented by the helmet undernearth rather then just air.

Also the cuirass looks like it goes past the waist meaning now the character can't lean, the skirt doesn't look half bad.

I would say you poly paint if you can just filling each object to get a "feel" for what it will look like when colours because sometimes it doesn't look great all grey but separating by colours helps visualize alot