the thing i did when i wrote a 6/4 melody was focus on making it mainly long notes, which made it sound less like a 3/4 song, but the percussion really made a difference for mine
Personally, I would write divisi on bars 4, 9, 13, 14, and 15 where the instrument is play more than one note, excluding string instruments, xylophone adjucents, and the piano.
dunno sounds more like a slow 6/8 to me. There's definitly a strong and weak beat in each bar. I personally think of 6/8 as being subdivided into groups of 3 while 6/4 has more of a 4+2 feeling imo.
i understand your confusion, but yeah i don’t write music for people to actually play it irl. most of my scores aren’t optimized at all and if this were to be played live there would most definitely be more than 2 oboes playing
