Obviously Akainu with the forces he brought would have given them a hard time, especially since Teach just newly acquired the Gura Gura no Mi and said he still can't control that power well, with the Marines still being able to call for back up. What would the point of having an all out fight, receiving injuries and losing members of the crew be? Especially since they would risk having their means of escaping, like their boat, destroyed in the process?
Akainu's equal is Teach's commander. It's settled.