Talk:Summer 2015 Event/@comment-27.32.61.130-20150828060328/@comment-26262450-20150828061201

You don't have to, however doing so allows for a critcal damage multiplier increase against the boss. The more times you clear them ie. sink the flagship, the more the mulitplier. If you sink them enough you can get it to the point where only one CI can do up to 325 damage. Enough to sink the boss in one hit.