☆☆☆ Hard (2019-12-08) ☆☆☆

100%, and you can use this as it is even when somebody starts the fight first or joining someone else's fight. This takes 26 turns. Granhildr+10 and Refithea+12 combo can do just about enough reflection to kill mobs.

1. ★6 Refithea+12
2. ★6 Mary+10
3. ★6 Chalkle+10 (Wave 2: Kill 8, 2, 1)
4. ★6 Helena+10
5. ★6 Eindolin+9
6. ★6 Granhildr+14
7. ★6 Lian+10 (Wave 1: Kill 11, 6, 9, 5, 8)
8. To be killed
9. To be killed

☆☆☆ Normal (2018-10-29) ☆☆☆

There is a good possibility to clear all.  Using 3 tanks, but Grosa, and Granhildr are main tanks, and Seir is more like backup.  Garinoth will hit 4 on Wave 1, and he will do good damage.  In result it will get much easier after that.

1. ★6 Anais+9
2. ★6 Grosa+9
3. ★6 Vincent+9
4. ★5 Garinoth+1
5. ★6 Seir+8
6. ★6 Veronia+9
7. ★6 Viola+9
8. ★6 Elizabeth+0
9. ★6 Granhildr+3

☆☆☆ Normal (2018-10-05) ☆☆☆

At this moment, I use this formation.  With this I can go around 85% in normal.

1. ★5 Eunice+9
2. ★6 Grosa+9
3. ★5 Vincent+9
4. ★6 Rafina+9
5. ★6 Veronia+9
6. ★6 Viola+9
7. ★6 Anais+9
8. ★6 Astrid+6
9. ★6 Angelica+3

Tip from YouTuber チャンネルハックン.