How does Paired Opportunists work exactly?

[Edward McGee]

Paired Opportunists Teamwork feat

Benefit: Whenever you are adjacent to an ally who also has this feat, you receive a +4 circumstance bonus on attacks of opportunity against creatures that you both threaten.
Easy enough to understand that part.

Enemies that provoke attacks of opportunity from your ally also provoke attacks of opportunity from you so long as you threaten them (even if the situation or an ability would normally deny you the attack of opportunity). This does not allow you to take more than one attack of opportunity against a creature for a given action.


This part seems nearly useless. You both have to threaten to attack. It says you can only attack once per given action. So it only seems to trigger if an enemy somehow provokes from one of you but not the other.
Broken Wing Gambit can set up a situation where if an enemy attacks you it would provoke from your ally with the feat. Add in Paired Opportunist and you both can attack.
I also think that if you are standing behind someone with a reach weapon and someone in front of them provokes you could take an aoo despite the cover.
Are there any other situations where the second part of the feat could come up?

[Kevin Willis]

Too many ways to enumerate but here's a partial list:


Spring Attack against you: normally you can't attack but if he provokes from your ally he provokes from you.
Attempting a Combat Maneuver without the Improved feat: normally provokes only from the target.
Acrobatics check to move that beats your CMD but not your ally's.
Litany of sloth denies one of you an AoO, but not the other.
Any class ability that includes the phrase "does not provoke from the target of..."  There are a LOT of these.