Board Thread:Questions and Answers/@comment-26355650-20151201042252/@comment-104.183.114.90-20151201044006

I think it depends on your priorities. Akizuki will probably be made available some other way in the near future. So if you really want that first class medal, you should probably focus on clearing E-5 hard first, and then spending any remaining time farming for Akizuki (it took me 8 days to farm her on E-3 easy; a lot of salty admirals report >100 S ranks).