Ranger REG said:
But are you attacking with two weapons during an AoO?
There is a difference between "wielding" and simply "holding" a weapon in your off hand.
Yup.
Which is why I rule that if you don't incur TWF penalties on your attacks in a round (you only use your primary weapon, and don't subtract anything from the rolls), then you cannot use your off-hand weapon for an AoO.
And if you
do incur TWF penalties on your attacks (even if you only actually swing one weapon), then both are 'available' for an AoO (since you're wielding both, not just wielding one and holding one), but you take TWF penalties on any AoOs you make.
I'm basically using Gruntharg's Law from the 3E Main FAQ as precedent: you can
hold a longspear in one hand, but you cannot wield it, and thus if you are holding it in one hand, you cannot make AoOs with it.
So extrapolating from that, if you are holding a weapon but not wielding it, you may not make an AoO with it. And conversely, if you can make an AoO with it, you are wielding it.
So if you want both weapons to be available for AoOs (or if you've attacked with both weapons earlier in the same round), you must be wielding two weapons, which possibly qualifies as "fight this way".
-Hyp.