Should you scrap an echo after a bad tune?
Usually max every echo. Tacet Fields drop tubes and Tuners together, and scrapping runs out of Tuners first: double crit takes about 33.3 Tacet Field runs by scrapping, against 16 by maxing.
The two methods
Max every echo: tune every echo to +25, keep the first hit.
Tune & scrap (strict): every tune must hit a goal stat until the goal is done. Scrap at the first miss.
Crit. Rate and Crit. DMG
| Method | Echoes | Tuners | Premium Tubes | Days |
|---|---|---|---|---|
| Max every echo | 7.8 | 288 | 77.2 | 4 |
| Tune & scrap (strict) | 78 | 666 | 52.5 | 8.3 |
Crit. Rate, Crit. DMG, and at least 1 of ATK% or Energy Regen
| Method | Echoes | Tuners | Premium Tubes | Days |
|---|---|---|---|---|
| Max every echo | 15.9 | 571 | 135 | 7.1 |
| Tune & scrap (strict) | 119 | 1,193 | 89.6 | 14.9 |
Crit. Rate, Crit. DMG, and ATK%
| Method | Echoes | Tuners | Premium Tubes | Days |
|---|---|---|---|---|
| Max every echo | 28.6 | 1,016 | 226 | 12.7 |
| Tune & scrap (strict) | 286 | 2,570 | 143 | 32.1 |
Why
Fewer tubes: scrapped echoes stop early (often +5 or +10), and discards refund 75% of EXP.
More Tuners: far more echoes get tuned, and discards refund only 30% of Tuners.
More Waveplates: 1 Tacet Field run drops about 4.8 Premium Tubes and 20 Tuners. Scrapping needs the runs for its Tuners, and the tubes from those runs go spare.
Scrap only when you have spare Tuners and few tubes.
The Simulator compares both methods, and your own scrap rules, on any goal.
Days: days of Waveplates (240 per day) in Tacet Fields. Drop data: community drop sheet, 1,697 runs, versions 2.0–2.5. Echo drops not counted.
This is what the numbers show. Every account needs different things, so weigh it against your own.