User blog comment:Hayashi H/Max-efficiency Map-clear Formations/@comment-115.66.229.88-20151017053414/@comment-26486243-20151024124936

An exception to the general rule as hinted by Zel is that in event combined fleets, the main fleet is unable to enter night battle. In that instance your hardest hitting carriers should go first so they can launch before being chuuhaed in shelling phase II.