.. and getting assaulted repeatedly by skeleton muskoxes. Oh the horror.
The original idea was to build an evil temple to armok, because the layout is such that there is a small cliff overlooking directly a magma pipe. I wanted (and still intend to) build a Vatican-style temple dedicated to Armok and Omelettius with the magma pool in the place of the courtyard, and a sort of serpent head looming overhead, which would be used to dump dwarves into the pipe as a sacrifice.
my original team was torn to pieces in a short while (barely managed to dig out the first two rooms). I sent a second reclaim fortress team, and I committed the mistake of unmilitarying half of them to try to tidy up the fortress. The first half died under the assault of the undead, the other half went mad.
Finally I wised up and set it so that civilians did not stray outdoors, and managed to fend off the musoxes long enough to set a trap at the entrance. This gave me relative safety. THe problem is that they still tear up traders (which wouldnt matter if they werent my only source of wood) and immigrants. I sort of solved this by establishing a citizens defense force, and now whenever people arrive I send my massive constripted army outside to provide safe passage. Usually they only suffer minor wounds in this process, and manage to fend off the undead just long enough, if the latter are separated.
Then I embarked on a safety measure: the map is divided in half by a small cliff (part of which overlooks magma) and I intend to dig out all slopes leading upward as to separate the up and the down, leaving the terrain around my fortress inaccessible except through it. This should allow me enough time to set two working areas (one up and one down the slope) as to get the workers inside (and outside, in the second working area), should the undead come near.
The problem is that when I dug my second entrance, I forgot to set a trap, and lost quite a few civilians to a muskox that slipped into the barracks.
Anyway, ATM I have set up a trap there, as well as a blast door (OK, an underground bridge that lifts up) to be able to seal the living areas with a flick should it be needed. Given the losses I have suffered I cannot, at the moment, afford sacrifices, but when I manage to establish the temple and get a large enough population, the churning will begin.
As to the sacrifices themselves: I was thinking on making a retractable bridge and having the sacrifices stand on it (possibly by drafting them).