The Plague Priest can fight anyone in base contact with the Plague Furnace. The Plague Monks can fight in close combat and still swing the Great Censer. Enemy models in base contact can choose to attack the Plague Furnace or the Plague Priest mounted upon it. Attacks against the Plague Furnace must roll To Hit against the Plague Monk crew's Weapon Skill. Count the Plague Furnace as the same number of Plague Monks that would normally occupy that space (typically 15) for working out the rank bonus of the Plague Monk unit.