I think you should create two versions of the armor: One that has a wooden appearance, which would make it light Armor
Light depends on how
light it is.
Wood tends to burn when you're hit by a fireball, or when you get too close to your campfire.
And then it rots, and gets ridden with worms.
Yeah, I can see why wood kicks ass. Why not go for a wooden sword?
and a stronger, rarer version made of metal (Like in the screen-shots) which would be either medium or heavy.
Why
rarer? It doesn't have to be rare. Where's the logic behind
this one.
The whole concept behind an argonian's armor (I think) is to frame it around a being who is often jumping & swimming. So there needs to be plenty of room to move in it, therefore there isn't much to the overall design. Few pieces and straps, a shield. Not much to amount to being all that heavy.
Though I wouldn't mind swinging a warhammer made of paper.