I was looking through the core spells and found the Paladin Spell Holy Sword, which states specifically that it overpowers whatever magic spells or enhancements that are placed on it. While this is fine and good, no other spell has this stipulation. As such, I have two questions:
If three creatures in the same party each cast Greater Magic Weapon on the same quiver of arrows, does that mean that the arrows get the net bonuses granted by the three spells or does each cast after the first reset the duration of the spell?
If the same three creatures each cast a different buffing spell on the same bow, does that grant a net bonus, or would the last spell be the only one that counted?