Righteous Wrath shouldn't be too hard, i think.
Code:
Allies gain one additional melee attack each round, at their highest attack bonus, when making a full attack. (This additional attack is not cumulative with other effects that grant extra attacks, such as a haste spell.) They also gain a +3 morale bonus on melee attack rolls and damage rolls. (This bonus on melee attack rolls does stack with the bonus provided by haste.)
But the antimagic zone looked overwhelming to even think about doing.