User blog comment:Hayashi H/Max-efficiency Map-clear Formations/@comment-26874235-20160324174206/@comment-26486243-20160405093100

The ones where daytime firepower is important for survival (3-5, Bm7 etc), optimality is based on descending order of firepower for the most part. For the others, it would be firepower+torpedo that counts. The problem with using lower night firepower DDs is that they may not sink ships when they're in chuuha while poi will have no issues at all. I've had my fair share of single digit HP boss survivals requiring doing the entire thing again.