I think you can mostly ignore the really complex bits, they're mostly us figuring out a way to regulate our own natural powergaming tendencies. I can't say I have any good advice beyond to play smart, which should basically be our motto.
Characters;
Net Patham, TheBiggerFish's character, is a war-technomancer from another universe. His "Pet" is a self-aware magical construct in the shape of a winged snake.
Blaze the Elf, EndlessBlaze's character, is a human from Earth who got transplanted into an elf, he does runic magic and blacksmithing. The same player has a side character or two whose names I'm inept enough to have forgotten.
The player Dustan Hache controls a necromancer presumably of the same name, we don't know much about him yet.
[REDACT], known as Amp, is my GMPC from before I became GM. Also a transplanted Earth Human, this one in a dorf. He does mechanical engineering, chemistry, and firearms. Also some physics of various sorts, not very practical here. He currently exists to provide an excuse for the world to have more advanced tech than default DF. I the player control literally every NPC.
Captain Sarvesh is the current NPC military commander of the fortress.
The Forgotten Beast known for now as Skalewyrm is a twenty-meter winged snake made of living steel covered in sawblade-feathers which is capable of using various breath attacks, from a short-ranged jet of plasma to a stream of liquid metal and a few things in between.
A being, place, faction, object, or [REDACTED] in a general eastern direction from the fort, referred to as Out East, is causing a severe drain in the Geothaumic Field, crippling every magic user on the planet's access to external power. Out East is probably the Big Bad for now, and no, they aren't on your side, whoever you are.
If there are more details or characters I can't think of them right now.
{I moved this list to the OP as well, because it's useful to have and I can update it later.