i think that the coolest think to do would be to have rows of different materials. make the ones farthest from the kings tomb the least valuable, such as granite and stuff. but the ones that are the nearest to the king out of silver, gold, platinum, ect. even the magic HFS metal if you have it. then line the walls with your orcs.
lastly, you need a large space behind all the statues, with a massive crown on the floor, and the actual coffin in the center of it. depending on your fort theme, it could be your fort symbol, a dragon, a skull, ect.
surround the coffin area with a lava moat and a very valuable bridge over it. surround the coffin itself with the kings possesions and a ton of valuable furnature and armour. line the walls with waterfalls. make your treasure room of coins behind that.
then seal the whole shebang off with walls and trap the bejeezus out of the path leading to the area!
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w orcs orcs orcs orcs orcs orcs orcs orcs orcs orcs orcs orcs orcs magma waterfalls waterfalls waterfalls waterfalls w
w magma w
w magma tons of awsome stuff w wwwwwww
w magma wwwwww w
d (your insane amount of statues) bridge coffin d coins w
w magma wwwwww w
w magma more tons of awsome stuff w wwwwwww
w magma w
w orcs orcs orcs orcs orcs orcs orcs orcs orcs orcs orcs orcs orcs magma waterfalls waterfalls waterfalls waterfalls w
wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww
always possible to make magmafalls instead of waterfalls if ya want, and be sure to power them with some dwarven perpetual motion machines so they keep going forever to sooth the soul of the dead king
(hey, if its worth doing, its worth overdoing i say!
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