I decided to try something new in my most recent fort. Several things new, actually, but rolled together they add up to one big principle: making a castle rather than a standard fort. The standard fort is a hole dug into the mountain; space surrounded by rock. A castle, on the other hand, is a shell defining an inside and an outside space.
I started out with three Miners, a mason, a craftsdwarf/mechanic, a maxed-skill brewer/cook, and a maxed-skill Herbalist. Took a bare minimum of food and as much alcohol as I possibly could, it's the true dwarf way. Started on a Haunted map with zombie elephants, so the first order of business was to dig in and make a shelter. From there, my miners just kept on going, trying to dig out the entire mountain.
The fort's been going on for a couple of years now and I just crossed the cave river. All rock on my side of the river has been excavated, except supports, a thin shell at the cliff face that'll be destroyed soon, and my castle. I intend to build one or two more castles between the river and chasm, and perhaps two more between chasm and magma. Everything else is going to be open space, a mountain on stilts (I know someone else already did this, but I don't believe he made castles).
The castle as it currently stands. Picture is from a reclaim I did in order to map the chasm and magma, so I can plot out my future development, so pay no attention to the dead cattle strewn around.
The castle has a lever it can pull to flood everything between a channel dug close to the cave river and a second channel near to the cliff face; thus, when trouble comes a knockin' (I'm expecting some good sieges), the dwarves can run into the castle, flood the expanse, and shell the enemy with the catapults. Once my forts between river and chasm are built, I should be able to coerce most of my population to not spend their time wandering out "front," so drowning deaths shouldn't be too severe.
As might be expected, some ore veins messed up the castle's smoothing (and blocked the firing lane of one of my catapults, so I didn't bother building it), but overall, the castle is situated fairly well.
Any thoughts? Anybody else tried doing it this way?