Haywire Foundry

Overview
Part 4 of the Vault of Night story arc.

Known Traps
In the western side there are numerous blade traps on the ramps.

On the eastern side the floor will collapse in two places. The first drops into a spike trap and the second is a very long drop into lava. After falling into the lava you will have to climb many pipes and go into a tunnel with a chest. after the chest there are a large number of acid traps.

In the next room on the east, there are many fire vents on the ramps. The final lever at the top will set off about 6 spike traps that will hit for a great deal of damage unless you make reflex saves.

Monsters
Most of what you will face will be types of warforged. There are also mithral and adamantine defenders (metal dogs) and three iron golems in one room (one named). The room with the wheel puzzles will drop oozes including arcane oozes and black puddings. Finally there are a small number of greater fire and earth elementals in the beginning and end.

The warforged you will encounter are as follows:

Engineers: Arcane casters - at normal these guys will cast lots of 4x magic missiles so the "Shield" spell is nice to have. The will also cast repair spells.

Drones: Fighters - just regular old melee combats. They will range if they can't close to melee.

Troubleshooters: Clerics - These will cast various disabling spells like Otto's Dance and Sleep. They also cast healing.

Surveyors: Rangers - will cast barkskin on themselves and allies. Otherwise they just range attack.

Rewards

 * From NPC: You can pick up the "Lightning Rod" staff at the end, but otherwise you get NPC reward.
 * In chests: Random loot in chests.

Tips and Misc
The puzzle with the wheels in the north passage is solved as follows:

1. Take note of the fact that there are three "inner" and three "outer" wheels.

2. Also note that the inner wheels each have a symbol immediately above them.

4. Finally, note that inside the bars with the chest are three more symbols (which I think are always all identical).

3. In order to unlock an inner wheel, the two adjacent outer wheels must be set to the symbol above it.

5. When you unlock a wheel, set it to the symbol you see inside the bars where the chest is.

6. Repeat steps 3 and 4 for each of the three inner wheels and the bars will open.