Infiniti2000 said:
But there are no rules on increases, stacking or otherwise. So, what rule do you have that says that two increases stack, unnamed or named? Not calling them bonuses does not mean you weren't using the rules on bonuses.
Why do I need I rule that says they stack? In the absence of any other factors, two increases will both apply, unless the result would be a contradiction.
Let us suppose for a moment that increases do not "stack." (Now, that's meaningless, because increases don't stack, lie down or play dead, they just make something bigger, but let's suppose it for a moment). That's bad news for someone who wants to increase his Strength at 8th level if he already did so at 4th. It makes it very difficult to increase the size of advanced monsters. Further, advanced monsters that increased in size would not necessarily have access to Improved Natural Attack. No character could advance beyond 2nd level in a class. Practiced caster and the Good domain power would not combine their effects for the caster level of spells. A character's hit points would have only a limited ability to increase, and any class ability that said it increased every X levels would be cut short after one increase.
Now, I did not use the word "increase" because the ability uses it, but simply because the ability states the weapon is treated as "+2 better than its normal enhancement bonus." There is no indication that it is a typed bonus that does not stack, so it must therefore be:
a) not a bonus, or
b) an unnamed bonus
If it is not a bonus, there is nothing preventing the increase from applying twice. If it is, it is an unnamed bonus. The question is simply, does more than one bane effect count as a different effect? Ordinarily, a weapon may have only one bane effect (by my reading, since bane is a particular property and each weapon has one chosen foe). The ranged weapon/armoo situation complicates this. Two bane effects versus the same creature type would clearly not stack, but two bane effects that are intended for different foes seem to be a different source to me. As each one pertains to a specific foe, it is not the same as one that pertains to a different foe (bane is not cast and a foe chosen each time; each magic item contains only one specific bane property).