[CocoaSpud]

For the simple AI we have right now,

A monster will try to pick the most damaging weapon it can equip that is usable at the current range to target. Once a target is picked it tends to stay with it until the target dies. Some ranged weapons need a launcher and ammo that are matched (that is, usable together). The class restrictions for the items must allow fighters before a monster can use it. The monster will use a ranged weapon even if by doing so it uses up it's only weapon (such as throwing an axe, which can be thrown or used close up). If a weapon has a damage value of zero, it probably won't get used.