A 12-bar built on minor 7ths — i-7, iv-7, with a 5⁷ turnaround.
the minor pentatonic + the blues ♭5 — SCL·02
Dorian over the i-7 (that ♮6 is jazzy), harmonic minor over the 5⁷ SCL·06
No major 3rd anywhere, so the major pentatonic is OUT — this is pure minor territory. The ♭5 is the only outside note you need.