An update:
Tried going more into depth with these, hopefully looks better... I'm kinda lost here.
EDIT:Tried adding the helmet:
EDIT 2:I was told that the armor looks like a suit because it is too "tight" and not bulky enough.
So here's my last attempt:
EDIT 3:Made the gold cross crossier and goldener:
EDIT 4:Tried adding a tint of red to the grey area so it won't be plain grey: