Opportunistic Fusion and Cleave?

[Corsair17]

Okay, I have a Vesk using an Ember Flame Doshko with the Opportunistic Fusion. Looking at adding Cleave and I cannot see where there would be anything to keep an Attack of Opportunity would not be able to use Cleave. Am I on the right track?

[HammerJack]

No.

Quote:

As a standard action, you can make a single melee attack against a foe within reach. If you hit, you deal damage normally and can make an additional melee attack (using your full base attack bonus) against a foe that is adjacent to the first and also within reach. You can make only one additional attack per round with this feat. When you use this feat, you take a –2 penalty to your Armor Class until your next turn.

An Attack of Opportunity is not a standard action. You cannot substitute other standard action abilities for the attack.

[Corsair17]

Thank you! It seemed like it would be an overpowered combination.