Starting an arrangement from a maximally dense section and subtracting layers is faster and more musical than building left to right
Arranging left-to-right faces the blank canvas problem at every new section. An alternative: stack all available material simultaneously in a single dense section. This is likely unlistenable but serves as a master palette. Subtract elements one by one until the section is musically coherent — this becomes the climax or drop. Duplicate the climax section and subtract further to create lower-density versions, each usable as a distinct song section. The arrangement is then the act of ordering these density variants. This approach is closest to a subtractive sculpting workflow rather than an additive painting workflow.
Examples
Stack drums, bass, chords, two melodies, arp, and ambience simultaneously. Remove arp and melodies — now it is the drop. Remove bass — now it is the breakdown. Remove chords — minimal percussive buildup. Arrange these in order.
Assessment
In a current project with at least 4 elements, stack everything simultaneously. Identify which combination feels like the climax. Create three density reductions. Arrange them into a section sequence and evaluate whether the order creates a satisfying arc.