User blog comment:RedTagRaid/RTR's Harukaze farming for the broke TTK/@comment-73.167.111.150-20160511014027/@comment-26262450-20160511032404

The AA formation is a bitch, its hard to balance fire power with plane survivability. If you're going to fail it'll most likely be there. I can't guarantee you will be getting nothing but S/A ranks, this is E7 after all. And sadly, I went broke clearing E7. I am around 30S/A ranks in without her in sight. I hope she'll come soon.