My gf and I just failed, miserably, at Haywire Foundry. We got to the point where you face several Adamatine and Mithril Defenders, a few Iron Golems and the red-named golem. Right after the rune-puzzle.
We spent fifteen minutes running around, me frantically healing to keep us alive. We managed to (slowly) kill off the defenders, but we couldn't do any damage whatsoever to the golems.
Was there something special we needed to do to defeat them?