Level 71 solution

Solver-verified route

1. Place Shooter 1 in lane 1.
2. Place Shooter 2 in lane 1, then wait ~30 ticks.
3. Place Shooter 3 in lane 1, then wait ~28 ticks.
4. Relaunch Shooter 3 in lane 1, then wait ~48 ticks.
5. Place Shooter 4 in lane 1, then wait ~20 ticks.
6. Place Shooter 5 in lane 1, then wait ~35 ticks.
7. Relaunch Shooter 5 in lane 1, then wait ~48 ticks.
8. Place Shooter 6 in lane 1, then wait ~4 ticks.
9. Relaunch Shooter 6 in lane 1, then wait ~48 ticks.
10. Relaunch Shooter 6 in lane 1, then wait ~48 ticks.
11. Place Shooter 7 in lane 1, then wait ~4 ticks.
12. Place Shooter 8 in lane 1, then wait ~31 ticks.
13. Place Shooter 9 in lane 1, then wait ~14 ticks.

Flow mode clears this board in 52 shots with 4 relaunches.