You asked for destroyer, so ignore this if not in the end somewhat applicable, but a magnet (for example) as it has salvage duration buff and good cargo room, fitted into the bs frigate bay can be handy at times. Cargo room for me is in the low 800s:
[Magnate, Salvage 2]
Power Diagnostic System II
Expanded Cargohold II
Expanded Cargohold II
Expanded Cargohold II
5MN Y-T8 Compact Microwarpdrive
Small Shield Extender II
EM Shield Amplifier II
Salvager II
Salvager II
Salvager II
Small Capacitor Control Circuit II
Small Salvage Tackle I
Small Salvage Tackle I
Hobgoblin II x3
Salvage Drone I x3