Talk:Spring 2016 Event/@comment-26912277-20160510004612/@comment-26912277-20160510011706

They didn't announce a maximum nor a number on how many times you need to do each of these nodes.

So I'm assuming it's just S rank each one of them once, the big one that people would've missed is S ranking node I on e5 since you cant damage enemies on an air raid node, it's not immediately obvious you need to S rank it at all.