Destroy all of the Brittle Rocks. * You start at (G-11). * The party will proceed to the wall at (G-10) and destroy it. * After the (G-10) wall is down, typically one party member will head to the northern wall at (G-6) to solo it. The rest of the party will destroy the wall at (H-8) and the two at (I-7). * For specific strategies about how to destroy the walls, refer to Assault Mission - Excavation Duty/Strategy * Qiqirn Mines will take out the wall in one shot. * Both kinds of drop Qiqirn Mine . * To use a mine, have the person engage the Brittle Rock, use the Qiqirn Mine on it, and stay engaged while it blows it up. * The mines appear immediately in a player's inventory, without going through the treasure pool. * The drop rate of these mines may be af