User blog comment:Hayashi H/Advanced Equipment Guide/@comment-92.139.136.246-20151101144744/@comment-26486243-20151101212232

The number of radars in the above determined directly by the firepower required for firepower cap. The only builds in that list that don't hit the 150 (151) cap are the DD ones (because they can't), and Haruna's (because sacrificing 1 radar for 3 firepower would just be sad).

If what you're trying to sink doesn't require 150 firepower... chances are that the expedition slot would be better off being used for resource recovery instead of direct combat support.

And quantifying accuracy would be not give particularly relevant results for the most part. Since the base accuracy of ships is unknown, there is no guarantee an optimal accuracy result that applies for Zuikaku will apply even to Shoukaku (we know Luck does affect accuracy), let alone any other ship of a different subclass. Based on that, my philosophy on this was to push firepower until the point where it hits diminishing returns and then just add accuracy blindly. It may not be ideal, but without being able to quantify base accuracy for any given ship I don't exactly have a better option.