Strange Signal drops Aether that you need to Awaken demons.
Eileen should be the Liberator taken for increased drop rate.
4★ evolved demons are recommended for Stage 6+.
Since each Aether specializes in an element, bringing demons that Null/Repel/Drain that element will make it a lot easier.
As well, the boss stage of Stages 1~8 has a specific pattern of using its element spells first, so make sure that you don't kill the adds if you're aiming to solo the stage.
Aether Drop Rates
- Strange Signal 5: 65% S, 30% M, 5% L Aether
- Strange Signal 6: 55% S, 35% M, 10% L Aether
- Strange Signal 7: 35% S, 40% M, 15% L Aether
- Strange Signal 8: 20% S, 60% M, 20% L Aether
- Strange Signal 9: 10% S, 60% M, 30% L Aether
- Strange Signal 10: 10% S, 40% M, 40% L Aether
Contribute to the drop rate spreadsheet! https://docs.google.com/spreadsheets/d/1LNiKKSdC51rc4cmOqthhVaRGTNUeIcG6W5wrXFUqjsk/edit?usp=sharing