Blue Archive Boss Counter

How this is computed

• Type multiplier — the game's own attack-versus-armour table. Explosion doubles against Light armour and is halved against Heavy and Elastic; Pierce doubles against Heavy and is halved against Special; Mystic doubles against Special and is halved against Light; Sonic doubles against Elastic and is neutral everywhere else.
• Terrain multiplier — the student's own terrain affinity grade for the boss's terrain, weighted SS 1.3×, S 1.2×, A 1.1×, B 1.0×, C 0.9×, D 0.8×, E 0.7×.
• Effectiveness = type × terrain. Ranking by effective ATK multiplies that by the student's own attack.