[Norfleet]

Armor-piercing weapons are highly effective against Mechanical Mans, because their hitpoints are actually quite poor beneath their armored exterior.

Golems, however, are too tough, and generally too singular, to be easily taken out by lowly crossbowmans. Since the Golem is generally used as an SC, you have to employ methods for taking down SCs, which vary widely depending on the golem's loadout. For golems, with their starting astral magic, their weakness tends to be magic duelling.