Are there meant to be grid numbers? I can't see them.
Look on the black edges of the image. They're somewhat faint. If you're on a phone and the image is shrunk you may need to zoom in.
((Can the throne room be placed mid-air like in, say, 15,50? And then build downwards from there to make a tower with the throne room at the top?))
I'll assume I can. Place my throne at 20,50, and build a pillar from 19,50 to 6,50 to connect the throne to the ground.
The pillar has a thin spiral staircase going around it from the outside, forcing people to be exposed to the elements if they try to reach the throne. The steps are just wide enough to leave room for a single person, who would have to keep their backs against the pillar to not fall.
Every grid, there will be 1 to 6 trapped steps with pressure plates, which, if pressed, would cause a stone arm with a boxing glove to emerge from the pillar and punch whoever activated it from behind. This, of course, would push the victim and cause the poor guy to fall to it's death.
((Generally grid coordinantes are written in (X,Y) fashion where x is horizontal and y is vertical. I'm assuming, by the numbers, that you've switched these around in this post))
[1]
Your throne, the throne of Randomness, ends up perched on the top of a single tall pillar of stone. Instead of a staircase of traps and punches you get a rope ladder and a sign that says "NO PEASANTS ALLOWED" taped to the bottom.
I'll start to dig, actually...
The king of the deep began below the surface, crafting a secluded place where he could survey the castle and maintain the trap systems of the construction.
Begin at (37, 0), and create a safe-room with scrying enchantments coating the walls. Size doesn't matter, only that the surveillance enchantments are sound.
[2]
The throne of Paranoia is placed within a partially buried bunker. A single crystal ball in the room shows a view of outside between bursts of static and foreign infomercials.
I shall build my throne room at 12, 5 and it'll look like a basement with a big throne in it.
[5]
The throne of Escapism ends up within a large basement chamber utterly filled with entertainment materials and items of all kinds. TVs, video games, movie projectors, arcade cabinets, cocaine dispenser, kegs of alcohol, kegs of pizza, extensive bookshelves stocked with books, dvds, and board games; all manner of things to help one pass the time.
I think you need to make the map smaller so that we can actually look at a reasonable amount of it at once.
Let's put our throne at gridspace 20, 2 (in X, Y form), because elaborate underground bases are cool and also I can see the location without scrolling around.
The "room" I build goes from 19, 5 to 19, 0, and is, essentially, a giant pit. The bottom is filled with spikes, and snakes and insects slither and writhe between the stakes. The walls of the pit are lined with the occasional rod, and even a few actual platforms (the largest one at the doorway to the throne room); in order to navigate your way into or out of the caste ("castle", barely), you must be able to jump, swing, or otherwise propel yourself from one rod to the next until you reach the platform and exit you seek; a single false movement, and you will be sent tumbling into the spikes and scavengers.
Did I do this right?
EDIT: I did not do this right.
Nevermind, ignore me for the time being. Just pull me in as the first replacement guy.
This actually looks fine to me (mostly). Using it.
[1]
Your throne, The throne of Perversion, ends up in what a pink neon sign declares the "SNEK PIT". It is little more than a cobble stone lined crater in the ground studded with free standing stripper poles around which large and seductive serpents dance in highly suggestive ways.
Four down, four to go before the first turn is done.
Here is the map link, I'm leaving it as a link instead of embedding because of the size.
https://i.imgur.com/OsSd3dm.png