SmokeAndMirrors

Depending on the tempo, and the direction of ascending or descending notes, you can safely and freely just move around in the chord accordingly, either accenting or underlining the other instruments. If you want to write OVER and UP, that sounds big-band/ska like with descending notes when played with faster sections, and with ascending notes it raises the tension for a chord progression, usually leading to solos and/or fills but could be used to kind of weave in and out as a sort of alternative melodic line. If you write DOWN and UNDER the other instruments, in ascending notes with harmonic resonance in rhythm it can make a really cool kinda flashy, shimmery effect again, depending upon tempo. With slower tempo it'll sound more like the notes are dancing around each other, because in a sense that's what they are doing. If you were to write down and under with descending notes, you'd be scooping your instrument out to create harmonic dissonance, the opposite of harmonic resonance, which can have a really interesting effect on the rhythm section. If you want to do both you can, but you'll be all over the place and the actual writing process will be much more laborious and challenging.

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"Like whispers in the dark..."