If the Prison of Elders truly is a horde mode, orb and energy production will potentially be through the roof if using the proper kit, bringing us to Bad Juju and its bonus Super energy and near limitless ammo for kills. While Gjallarhorn has its uses for single targets like raid bosses, we will likely have to engage several mobs of enemies at once, and generating energy to regularly nuke those enemies might take precedence. As a supposed test of endurance, it also helps to have one weapon that can make its own ammo from kills. Clearly Obsidian Mind Bloom Voidwalkers armed with Bad Juju will own any kind of horde mode, but what do you think? Is Bad Juju to be king of the Prison? Or will you still bring your Ballerhorn?