GW2: Sorrow’s Embrace (SE) Storymode Help

This dungeon is fairly straight-forward, but there are a few tricky spots.  I'll highlight these with instructions:

  • Locked Door, Pounding Pistons(mini-puzzle/traps)
    • There will be a locked door that needs to be repaired, and nearby there will be some pistons that smash down from the ceiling.  Have someone run through the pistons right after they smash down, aggro the mobs on the other side, and run back out.  Fight them in the open area.  Afterwards, send everyone through to clear out any mobs that weren't pulled.  A mesmer with Blink and Portal Entre can make it trivial to avoid the pistons.  Grab the gears, drop off the ledge, and fix the door.