[Norfleet]

Monoliths have a weakness against point-blank annihilation. They're no harder to kill than any other prot-30 thing with hundreds of hitpoints, with the added benefit that a monolith is unable to strike back at you, and can only cast a limited number of spells before it passes out, which hurts its protection values. Anything which is armor-piercing or armor-negating will rip it up easily.