Board Thread:Fleet's Prepared-ness/@comment-26714864-20150716232441/@comment-26289480-20150717075023

Yep as long as you dont beat the map. you can change diffculty any time you want (but do bewarre it resets the boss HP bar. So if you manage to get boss to half hp, and decide to swap to easy, you have to start from 100% again)

Ship lock based on last event, is easy doesnt matter, use whatever ships you want.

Medium and hard is the same. Certain ships used in certain maps cant be used on other maps.

And yes 91 AP shell is top of the list. You want 4.