As I looked closer at the concept art for HMNZS Aotearoa I notice a few minor details...

The Typhoons are on the on the port and starboard quarter end of the flight deck in a well... and the amidship you have 2 .50 cal (one port, one starboard) and forward under the phalanx there is another 50 cal...

• From concept to launching - HMNZS Aotearoa
• HMNZS Aotearoa Starting Sea Trials
• NZ Navy's Aotearoa is christened in Korea

I always thought that the typhoons were going to be amidship on the superstructure... now I am not so sure... lol

So the armament might actually be;

x1 Phalanx CWIS
x2 Typhoons
x3 50 cal HMG