User blog comment:Shinhwalee/Major Event Preparation Guide for Admirals (OUTDATED)/@comment-218.66.155.207-20150721042515/@comment-99.238.138.132-20150722224138

That point only applied if you wanted to clear on a different difficulty than the the one you're currently farming on. You cycle difficulties so that you don't accidentally clear it on easy when you wanted to clear on hard.