Took me the liberty to look up some stirrups and saddles for once - although the Elves did not need such things in the books, the new [movie] canon seems to disregard that fact so we'll go with that then...
This is a good picture to get a look at his armour. As you can see I have simplified it heavily on my sculpt. I should probably add that he has his gambezon/cloak/elf-parka-thingie open when he fights so that the harnesk shows, instead of the gambezon. Mr FoB can probably correct me on the correct terms when it comes to correct armour and such correctivness (which I hope you do!).
His shoulder pads were designed in a very impressive way in the movies: Some sort of very interesting feather-like armour is strung from the lamellar-shoulder-pads which in turn are attached to the mantle. Hence the weird shape of the mantle in the picture above. Numbers 1 and 2 are there to show where some serious GS:ing is needed.
The arrows shows how I sculpted the fluting and armour-decorations.
When searching for inspiration regarding the armour I did take a look at Games Wokshop's armoured Thranduil. The shoulder pads and the lamellar armour on his upper arms are much better than what I have done, but I did allow me to take some short-cuts. My skills aren't there yet - too fiddly, especially considering the continuation on this post: The fluting of the Elven armour!
Above, we can finally see how I am faring with the fluting or decorations of his armour - EDIT: No we can't, I messed up the pictures.
The fluting has taken some time to do, but I do feel it looks acceptable now. Also, he's no longer as bold as I am.
Things left to do, a list mainly for my own sake:
2) Finish the stirrups.
3) Finish the hair in such a way that the armour doesn't get too obscured.
4) Make a scabbard and attach it.
5) Make the gambezon look more like fabric.
6) Sculpt a simplified version of the feathers on his back - as well as finish the mantle.
7) The elk must be elkified.