Point 1：You will need at least one of Seir, Mamonir, Eldora, or Karin for this. Arcstar can neutralize Inc DMG boost, so normally DMG boost does not work. However these mercs have a special skill that can ignore the neutralization, and can output massive damage.

Point 2：Use as many mercs as you can to stack up strong Inc DMG boosts, then finish with Seir. Please see here for recommended mercs with incoming DMG boost skill here.

1. ★6 Celia+15 (Incoming DMG boost +95%)
2. ★6 Wester+4 (Incoming DMG boost +75%)
3. ★6 Zarka+10 (Incoming DMG boost +145% Status -65%)
4. ★6 Esther+15 (Incoming DMG boost +100% Status -65%)
5. ★6 Elija+5 (Incoming DMG boost +100%)
6. ★6 Scarlet+15 (Incoming DMG boost +100% Status -75%)
7. ★6 Orienne+10 (Incoming DMG boost +125% Status -65%)
8. ★6 Denarisa+10 (Incoming DMG boost +125%)
9. ★6 Martina+15 (Incoming DMG boost +100%)
10. ★6 Gloria+5 (Incoming DMG boost +65%)
11. ★6 Seol Ah+15
12. ★6 Seir+12