A♯ Locrian Pentatonic

Built from the root, minor third, fourth, flat fifth, and flat seventh, A♯ Locrian Pentatonic is a five-note scale that spells out a half-diminished chord. That makes it an efficient, uncluttered option over m7♭5 chords, where a full Locrian mode can sound cluttered. Straightforward jazz vocabulary once you're comfortable with half-diminished harmony.