Board Thread:Event Official Threads/@comment-25730832-20161115130504/@comment-25276561-20161122230027

got debuff for e3 (hard) -went through e2 (hard) with subs to get s rank at K and L while keeping landbase un damaged, did not go to boss -got s rank in e3 in C, D, H, J, K, it made sound after going back from K

so i dont think you have to clear e2 boss with S