Board Thread:Fleet's Prepared-ness/@comment-26873472-20151030134752/@comment-26460664-20151102135535

GustavMax wrote: I was trolled really hard in night nodes in E-4, and the reason it took me so long to pass E-6 was because I didn't have any high luck DD available, I didn't have much time to lvl another one so I just kept going to no avail, but after I heard about the event extension I spent a couple of days getting Shigure to kai2.

As luck would have it I finished last dance in a single sortie. I'm assuming that your statement is true if your Yukikaze is trained after the event and your Myoukou have not seen many action in Summer 2015.