Board Thread:General Discussion/@comment-28265054-20160710100732/@comment-460323-20160723173207

It's a conundrum, you'll need the Akizuki gun to get the +4 AACI. But if you've the Akizuki class, then you wouldn't even bother AACI with other ships. Without the Akizuki gun, however, you either go for the +3 AACI that renders your DD useless or be content with the +2 AACI that's probably there just for the lol.

Unless you upgraded an AAFD to the Akizuki gun (which I regretfully did in the past), any >=+4 AACI that isn't Maya is either pointless or render your Kasumi/Isuzu K2 useless.