http://trishulgroup.blogspot.in/2008/10/indian-navys-ciws-saga.html
Other than the great visual effect, neither the Phalanx nor the AK-630 are ideal for swarm boats. You are better off with a stabilized weapon system like the Israeli Typhoon and French Narwhal. A good compromise CIWS system is the 35mm Millennium Gun.
OK then, let’s add your selections to the mix of the rearmed Zumwalt and see who the winner is.