[Graeme Dice]

Originally posted by Morbius:
what about robes of shadow? do they suffice?

That depends on whether the arrows are considered to be magical weapons or not. If they are only normal weapons, then those robes will have a 75% chance of protecting you. If they are magical, then the robes will do nothing.

and what about robes of invulnerability -- are those better than robes of missile protection when it comes to fending off missiles?

The robes of invuilnerabilty have the same effect as the invulnerability spell. They set your base protection to 30. This means that it will only be an extremely lucky arrow that manages to get through that much armor.