Considering your allies opponents simply for the sake of AoO's is completely foolish.
There are two good uses of this feat that I've come up with:
1) It's very good for characters with a reach weapon, particularly the guisarme. Once you've tripped someone, you can use the AoO they provoke by standing to take a 5 back so they can't simply take a 5 themselves and attack. Instead, they have to move and provoke another AoO...which this time you can use to trip them again.
2) Take this feat and ten levels of the Dragon Descendant PrC from 'Dragon Magic'. The PrC makes it so that every attack against you provokes an AoO. As long as you get your Dex high enough, you'll be more or less immune to melee attacks.
The first build is useful and makes reach weapons much more viable while the second one is completely broken.
There are two good uses of this feat that I've come up with:
1) It's very good for characters with a reach weapon, particularly the guisarme. Once you've tripped someone, you can use the AoO they provoke by standing to take a 5 back so they can't simply take a 5 themselves and attack. Instead, they have to move and provoke another AoO...which this time you can use to trip them again.
2) Take this feat and ten levels of the Dragon Descendant PrC from 'Dragon Magic'. The PrC makes it so that every attack against you provokes an AoO. As long as you get your Dex high enough, you'll be more or less immune to melee attacks.
The first build is useful and makes reach weapons much more viable while the second one is completely broken.