[RPG] Manyshot and weapon special abilities

Sacred Weapon stacks with other weapon bonuses. A warpriest simply cannot raise the enhancement bonus above +5, regardless of the sources of that enhancement, so if a weapon has some enhancement already before using Sacred Weapon, normally some bonuses would be lost. However, instead of increasing the enhancement bonus further, you can bestow special abilities upon the weapon, that replace some of the enhacement bonus you might have had, including the amounts that would go over the maximum allowed +5.

1. Precisely, but you don't have to spend them on abilities. You can simply lose them if you prefer. Why would you like that is anyone's guess.

2. No. You can only replace bonus that would be the result of Sacred Weapon. You cannot replace an enhancement bonus that has some other source. While this is not explicitly stated in RAW, there is a passage saying

   The enhancement bonus and special abilities are determined the first time the ability is used each day, and cannot be changed until the next day.

   That means you choose your enhancement bonus and special abilities without regard to existing bonuses and abilities on the target weapon. You might even choose ones that you have from some other source (spells, weapon enchantments, other player's abilities) and in that situation the enhancement bonus will stack but not exceed +5 in total and the doubled special abilities will not stack. If you decide to use the ability on a different weapon, you have to use the same choice of bonuses and abilities and resolve the final effect independently

3. This fragment means that when Sacred Weapon ability takes effect the enhancement bonus is considered first. In a situation where the weapon is left with no net enhancement bonus, no further special abilities will be added.

I believe this is answered on the FAQ:

Weapon Bonuses: Can weapon special abilities (such as bane) or class abilities (such as a paladin's divine bond) allow you to exceed the +5 enhancement bonus limit and the +10 bonus-equivalent limitation?

For the enhancement bonus limitation, it depends on the specific effect or ability that's altering the weapon.

Bane: This allows the weapon to exceed the +5 limit, but only against the designated creature type. For example, a +5 dragon-bane longsword is normally a +5 weapon, but has a +7 enhancement bonus against dragons and deals +2d6 points of damage against dragons.

Paladin: The divine bond ability says "These [enhancement] bonuses can be added to the weapon, stacking with existing weapon bonuses to a maximum of +5." That means if a paladin has a +5 longsword, she can't use her divine bond to increate the enhancement bonus to +6 or higher (but she could use her bonuses to add abilities such as flaming to the weapon).

The +10 bonus-equivalent limitation is a hard cap for all weapons; you can't exceed that even with class abilities or other unusual abilities.

Since +10 is a hard-cap, any futher enhacements or special abilities should take no effect. In other words, there is no greater than +10, it stops at +10.

Projectile weapons with this ability bestow this power upon their ammunition.

This text is there so we don't have to use bows as melee weapons in order to benefit from that special ability. This does not mean the special ability is transfered to the arrows, but that arrows fired from that bow gain that effect.

For reference, here are three different threads at paizo's messageboards discussing this exact topic (there are no developer comments though):

• How high can I rig up the magic on Bow +Arrows?

• Magical ammunition, magical bows and special abilities

• Exceeding the +10 limit for weapons