This room is filled with vast numbers of non-elite, low hp dwarves, linked in groups of 10 or so. These dwarves are on a fast respawn cycle, with a number of patrols wandering through the area. On the far side, the doors to the Iron Hall stand locked and unpickable. Two braziers flank the doors, each guarded by a fire elemental. Two flamekeepers are within the room at any one time, with about 8 possible spawn points spread around the room. At this point you will have covered nearly half the spawns of the flamekeepers, and will have otherwise located them.