greenfield do i really need to take the time to distroy and remove all your ideas of why this wouldn't work or can i say simply
fantasy game an any wizerd can alter his spells in any way if he only cares to spend some time doing it
I guess it depends on how much you care to fantasize now, doesn't it?
I've seen comments in here about using Spellcraft to change spells on the fly. I'm not sure if that's a house rule someplace or if it's actually in one of the books.
According to what I know, you need Feats to do that sort of thing, and there isn't always a Feat for whatever change someone might like.
I went to ridiculous extremes to show how foolish it was to try and mix magic and physics. And yes, I really meant "ridiculous", because the whole thing really is.
You want to make a geosynchronous floating platform? Use the old Floating Castle trick, where you suspend the entire thing from a Forcecage or Wall of Force made permanent. (The cage is better, structurally, since it has horizontal faces, and can be made in the laticework fashion so you can hook things on and meld them in/through it. Wall is cheaper to make Permanent.)
That eliminates half of his issues with physics.
As far as I know, you can't get Aid Another bonuses on crafting via a Fabricate spell, since nobody else can actually work on the item being crafted. And as a DM I'd cast an Epic level Dispel Bullspit on having Unseen Servants make any kind of Craft skill check, but that's up to the individual DM. Also, the argument about using Moment of Prescience on a Craft roll? It's only applicable to opposed skill checks, according to the SRD. So that +65 to the Craft check to make those mirrors just got a whole lot less.
But let's say all of this is somehow handled. You're only 200 miles up, which is nothing in terms of orbital distances (Normal Geosynchronous is 22,500 miles up). You have a mirror array the size of Delaware, and you have an army of loyal critters who can survive without air, and can "hear" your orders somehow, and are allowed to make attack rolls (unlike the Unseen Servants originally described.). They're all proficient with Heliograph Weaponry, and all your Mirror's are masterworked.
So you place your Eyes of the Eagle over your eyes, and look for your target, Spamalot Castle! Want to figure the Spot penalties from 200 miles, even with the Eyes?
So yeah, go ahead and tell me how wrong my various calculations are, how they somehow don't apply, or show me the rules that say this will all work. I'm betting you actually can't.
I have a counter, you see.
You deliver the ultimatum, "Surrender or fry!"
My caster (Only 17th, since I have to be in the inferior position for the threat to work) has to come up with an answer. He uses his Rod of Maximize (Greater), and his Ring of Evasion, his Necklace of Adaptation, and the Delay Spell feat.
Cast Time Stop (Maximized), then Greater Teleport to your platform. Delay Spell on Greater Creation, to create 17 cubic feet of weapon's grade Plutonium, set to appear in 4 rounds (which is after my Time Stop has expired).
17 cubic feet of fissionable material is so much more than a supercritical mass, it would produce a nuclear explosion larger than anything ever seen. You, your minions, your mirror array, your platform, all converted to a rapidly expanding cloud of radioactive vapor. That the matter that triggered this is only temporary is of little importance. It only had to exist for the few milliseconds needed for the chain reaction.
Now, using my Ring of Evasion and Moment of Prescience, I could do without the Time Stop and Delay Spell, and simply appear then nuke you. 95% chance I'd survive (just don't roll a 1), but why take the chance?
And if 17 cubic feet of Plutonium isn't enough, I could use Sudden Widen to multiply that by 8. (Yeah, I know it doesn't work that way for this spell, but since actual rules got tossed out before the platform got created, ignoring them here seems a fitting way to destroy it.)
Like I said, it all depends on how much you want to fantasize.