User blog comment:Homuhomu123/Trigger Rates & Effectiveness of Anti-Air Cut-In (AACI)/@comment-26193115-20150528065509/@comment-25779449-20150609081428

The activation chance can be increased when multiple ships in your fleet can do AACI. For example, you have Akizuki (H.H.R) and Kagerou (B.B.R). Let's assume each of them have an activation chance of 50% when sortie alone. Since B,B.R. has higher api value than H.H.R., therefore:

1)  Kagerou (B.B.R.) has 50% chance to trigger AACI, and 50% chance not triggering it.

2) When Kagerou failed to activate that, Akizuki (H.H.R) will have 50% chance to  trigger AACI. That means 50% x 50% = 25% for Akizuki

3) Therefore, the total activation chance is 50%(Kag) + 25%(Aki) = 75%.

As for your set up questions on Maya K2 & Akizuki:

1) Maya Kai Ni:  you'll very probably trigger H.C.R.. As you can see in the priority table, When the prerequisite are met, H.C.R. overrides B.R., H.A., H.C. & C.G.R., Not sure about B.B.R., but I think H.C.R. takes over it, too. You may check the api value by yourself by inspecting the network traffic (as explained by Reikyu in the comment below). Note that 12.7cmFD can be classified as either "H" or "B".

Not sure about the extra 25mmCD, but I guess it won't change the AACI mode. Sorry I cannot help you test that.

2) Akiziku will do H.H.R. in your setup according to the priority table. Note that 10cmFD can be classified as either "H" or "B".

Another thing is, api_1 & 2 are only achievable by Akiziki, while 10 & 11 are exclusive to Maya K2.