There so many solo with ammo operators. Exu2 solo, Lemuen solo even Ch'alter solo and as expected Wisha solo... gave a honest try to 5 stars only, 5 stars and Exu2 trait, 5 stars and Ela mines and Exu2 trait but Toddi and Insider is not enough damage. So decided to use boss killer that fall off grace to one sister and marksman that was sidegrade to other sister before her alter.