Follow that group

With reason many monsters with half the wit as you would reset that trap, but you're not trying to sit around and wait however long it takes to see another rogue disable it. Following these three might be a easy shot at increasing your level, since the bard more than likely alerted a huge chunk of low level creeps that will swarm at them within minutes of entering further into these tunnels. You slink into the darkest of shadows, pursuing their steps with care, but still keeping them in eye shot.

The journey through the tunnels was not as you'd assume. For one not many of your kind has swarmed them into a favorable position, and the monsters that do show up usually get destroyed by the Barbarian with a heavy strike or the Rogue's impeccable speed. These are in no way low level heroes, but their levels don't prove them of high attributes. There needs to be a way of using the environment to your advantage, or trying to coax others to gather at your position to strike as a unit.