Clean power setup under my DJ booth – ideas wanted!

That sounds like a solution specific to your setup, and is the opposite to standardisation, no? I worked a few years in AV rental, and there we stick to standard 3 way boxes and standardized cables. No “specials”, because you can forget these in the warehouse…

If you do want to daisy chain, consider this: Showgear PowerBOX 4 verdeeldoos 4-weg met PowerCon kopen? | Stage Roads I use these for my coverband: everything on the stageblock is powercon, from there I daisy chain to my speakers with powercon, and these boxes…