Corsairs post chaos.

I thought I heard around here that chaos boosts buccaneers and corsairs a lot. But while talking to a friend earlier he said corsairs are not the top DPM or second anymore since they lack DPR lowering skills, and that chaos only makes ship unbreakable and nothing more.

So I checked the skill tables to see the Cannon dmg before and post chaos and I see no increasement either

Does Chaos help Corsairs other than making ship unbreakable?