Preliminary directions in the dungeon to the Silver Scope Spymaster and the nearby Copper NPC:
Go down ramp, right (NW), at two ramps down, take the SE one, and keep going straight. At the T-intersection, go right. The first big room holds the Bronze Gauntlet Knight-Commander.
Go down ramp, right (NW), at two ramps down, take the SE one, and keep going straight. At the T-intersection, go left. The first big room to the right holds the Silver Scope Spymaster.
Go down ramp, right (NW), at two ramps down, take the NE one, at intersection go left and keep hanging left. The first room holds the Copper Cog Craftsmaster.