Amulet of Mighty Fists and certain weapon enhancements.

[Whos_That]

I had a question regarding the amulet of mighty fists mainly in regards to weapon enhancements like

Dueling-PFSFG:

A dueling weapon bears magical enhancements that makes it particularly effective at performing certain combat maneuvers. When a dueling weapon is used to perform a combat maneuver that utilizes the weapon only (see below), it grants a luck bonus equal to twice its enhancement bonus on the CMB check made to carry out the maneuver. The dueling weapon also grants this same luck bonus to the wielder’s CMD score against these types of combat maneuvers. These combat maneuvers include disarm and trip maneuvers, but not bull rush, grapple, or overrun maneuvers. If you’re using the additional combat maneuvers in the Advanced Player’s Guide, this also includes any dirty trick maneuvers that utilize the weapon, as well as reposition combat maneuvers, but not drag or steal combat maneuvers. Note that this luck bonus stacks with the weapon’s enhancement bonus, which in and of itself adds to CMB checks normally.

and

Crurageous:

A courageous weapon fortifies the wielder's courage and morale in battle. The wielder gains a morale bonus on saving throws against fear equal to the weapon's enhancement bonus. In addition, any morale bonus the wielder gains from any other source is increased by half the weapon's enhancement bonus (minimum 1).

Especially when it comes to a weapon you have(for unarmed strikes or natural attacks) or for weapon enhancements that change your overall plus, like:

Furious:

A furious weapon serves as a focus for its wielder's anger. When the wielder is raging or under the effect of a rage spell, the weapon's enhancement bonus is +2 better than normal. If the wielder has a rage power that gives a skill bonus while raging (such as raging climber, raging leaper, or raging swimmer), the wielder gains an enhancement bonus to that skill whenever the weapon is wielded or held in her hand, even when she is not raging. This bonus is equal to the enhancement bonus of the weapon (and also includes the +2 if the wielder is raging).

I have not seen any RAW FAQ in regards to this. Mainly enhancement bonuses do not stack, but if you were to have one that was +5 and one that had +5 worth of enhancements but made into another slot or was slotless, would those items stack for the purposes of each other? I have heard quite a few different oppinions and would like some more to come to an average for or against vote lol.

[Nefreet]

Is your question whether or not a +1 Dueling Courageous Furious Amulet of Mighty Fists is legal? It's a little unclear.

[blahpers]

I'm not sure what the question is. Perhaps if you were more specific. Is the fact that this is an amulet of mighty fists instead of, say, a dagger important to the question?

[Whos_That]

sorry, my question was can you use a +5 amulet of mighty fists and an amulet of mighty fists dueling courageous furious and have those bonuses based on the +5 amulet.

[Nefreet]

You may only wear one Amulet at a time.

[blahpers]

Assuming Nefreet's approach.

A +1 dueling amulet of mighty fists adds a +2 luck bonus to disarm, trip, dirty trick, and reposition maneuvers using the weapon and to CMD against such maneuvers. (Note that you already get a +1 enhancement bonus for the weapon itself; these stack.)

A +1 courageous amulet of mighty fists grants a +1 morale bonus to fear saves and increases other morale bonuses by 1.

A +1 furious amulet of mighty fists acts like a +3 weapon when the wielder is raging and adds +1 (+3 while raging) to any skill that can be augmented by one of the wielder's rage powers. (Ugh, that's a complicated design for a weapon property).

None of these abilities interact with each other, so asking whether they stack is meaningless. A +1 dueling courageous furious weapon would be priced as a +7 weapon, and this is perfectly legal. However, there is no price listed for an amulet of mighty fists with a modified bonus (including enhancement bonus and weapon properties) higher than +5. It's simple enough to extrapolate such a bonus, but if you're in a "NO RAW IS GOD" situation like PFS then you're probably out of luck.

Edit: Wait, you want to wear two amulets? Good luck.

[Red Rabbit]

"Dueling" costs 7000 gp as a weapon enhancement, not (as blahpers seems to assume) +1 bonus. Was that maybe the OPs question? "Can you add weapon special abilities that are not priced as +X bonus to an amulet of mighty fists?"

[ShieldLawrence]

I'll just add that Courageous was changed in the Ultimate Equipment FAQ:

Courageous Weapon Property: Is the courageous weapon property meant to help only on saves against fear? The text seems to give unfettered increases to all morale bonuses, which is way out of line for a +1 equivalent weapon ability.
A courageous weapon was meant to help only on saves against fear (either adding its enhancement bonus as a morale bonus on saves against fear, or adding half its enhancement bonus to your existing morale bonus on saves against fear, whichever is best for you). However, the wording is in error. The last sentence should say “on saves against fear” after “any morale bonus.” This change will be reflected in the next errata.