There's Weapon Focus, the improved two-weapon fighting or improved two-weapon defense (if you don't have them). Iron Will might not be bad as I'd imagine your will save might be low... Double Hit on Crystalkeep is kind of neat, if you make an OA, you can make two attacks, one for each weapon. Two Weapon Pounce is interesting as well.
At the end of a Charge, you may attack with both your primary & off-hand weapons. The +2 attack bonus for the Charge and the –2 penalty for fighting with two weapons cancel out. You still receive the –2 penalty to AC for the Charge.
Also, Dual strike might also intrigue you:
As a Standard Action, you can make a melee attack with your primary and off-hand weapon. Both attacks use the same attack roll and the worse of the two weapon’s attack modifier. If you are using a one-handed or light weapon in your off-hand, you take a –4 penalty; otherwise the penalty is –10. Each weapon deals its damage normally and reduction/resistance is applied separately. Precision damage (such as sneak attack) is only applied once. A critical hit only deals critical damage from the primary