Board Thread:Event Official Threads/@comment-25730832-20161115130504/@comment-27669891-20161121003526

The debuff method is:

E2 -  Achieve SS rank on A G K L

E2 - All the air raid in A SINGLE SORTIE is eliminated by LBAS twice with AS+ condition

E3 - Achieve SS rank on A I L

E3 - Get S rank from C D H J K