Underground Evil Castle 11 to 15F
Mobs here have very high HP. Thus mercs with skills that determine damage by enemy's HP%, such as Angelica, Bellasier, Ridel, or Frederica are very useful here.
☆☆☆ Underground 11F ☆☆☆
If Iris with shield x 2 can survive until Ridel kills 2, Iris will become invincible state.- ★6 Iris+15
- ★6 Isabel+15
- ★6 Shoman+14 (Kill 3, 2, 8)
- ★6 Ridel+15 (Kill 2, 8)
- ★6 Viola+10 (Kill 5, 7)

☆☆☆ Underground 12F ☆☆☆
Charmed 2 to 6 will kill each other.- ★6 Lulu+14
- ★6 Iris+15
- ★6 Isabel+15
- ★6 Esther+14 (Kill 1)
- ★6 Viola+10 (Kill 7, 9, 8)
- ★6 Orienne+10 (Inc. DMG Boost)

☆☆☆ Underground 13F (Strategy 1) ☆☆☆
- ★6 Refithea+15
- ★6 Ceres+10
- ★6 Michaela+15
- ★6 Alche+10 (Kill 1, 2, 3|4, 5, 6)
- ★6 Esther+14 (Kill 7, 8, 9)
- ★6 Kaoli+12

☆☆☆ Underground 13F (Strategy 2) ☆☆☆
- ★6 Isabel+15
- ★6 John+10
- ★6 Veronia+14
- ★6 Alche+10 (Kill 1, 2, 3|4, 5, 6|8)
- ★6 Angelica+13 (Kill 7|9)
- ★6 Benshina+14

☆☆☆ Underground 14F (Strategy 1) ☆☆☆
Ridel needs to kill 8, and 9 before the charmed boss attacks, other wise the boss will not kill 1.- ★6 Bellasier+14 (Kill 2, 3|4, 7)
- ★6 Orienne+10 (Inc. DMG Boost)
- ★6 Refithea+15
- ★6 Veronia+14
- ★6 Ridel+15 (Kill 8, 9|5)
- ★6 Mia+10

☆☆☆ Underground 14F (Strategy 2) ☆☆☆
- ★6 Bellasier+14 (Kill 3, 2, 4|7, 6)
- ★6 Mary+10
- ★6 Michaela+15
- ★6 Ridel+15 (Kill 8, 9)
- ★6 Lulu+14
- ★6 Angelica+13 (Kill 5|1)

☆☆☆ Underground 15F (Strategy 1) ☆☆☆
If Refithea is equipping shield x 2, then there is a chance she might get killed. If that happens, try again. Bellasier is using shield x 2.- ★6 Shoman+14 (Kill 6, 7, 8)
- ★6 Refithea+15
- ★6 Veronia+14
- ★6 Bellasier+14 (Kill 2|1, 3, 5)
- ★6 Frederica+10 (Kill 4, 9|8)

☆☆☆ Underground 15F (Strategy 2) ☆☆☆
- ★6 Refithea+15
- ★6 Veronia+14
- ★6 Bellasier+14 (Kill 2, 1|6, 7)
- ★6 Taylor+13 (Kill 3, 4, 5, 8|9)
- ★6 Gloria+4

☆☆☆ Underground 15F (Strategy 3) ☆☆☆
Depending on critical hits, you may not be able to kill mobs, or Bellasier may get killed. So try few times.- ★6 Veronia+14
- ★6 Bellasier+14 (Kill 2|1, 5, 8, )
- ★6 Mary+10
- ★6 Frederica+10 (Kill 4, 9|7)
- ★6 Christina+15 (Kill 3, 6)
