Blue Archive Boss Counter
Who counters each raid boss — students ranked by exact type × terrain effectiveness
How this is computed
Effectiveness against a raid boss is the product of two independent multipliers. Optimising one and ignoring the other is the usual way a raid team underperforms.
- 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.
The combined range runs 0.35× to 2.6× — a seven-fold spread no amount of levelling, gear or bond closes, and why a correctly-typed student on bad terrain can be worth less than a neutral one on good terrain. Longer version: the damage table decides your raid team.