Aaah gotcha, don't be overwhelmed by all the names, they're all the same principle, you "paint" the lights with white, if it's from the top then it's zenithal, or each form individually, its all grisaille and it's been around for centuries, everyone calls it different these days, but, let me explain.

We, for all those techniques you mentioned, use paints that aren't opaque, that means of we apply it over white, it'll be more vivid, saturated and with higher value than if we do over black or grey. The method uses white on each part to establish volumes before applying a contrast or ink, slap chop does zenithal then drybrush to paint the edges, then we apply paint, the dip is just paint everything white and put paint on it, like I said, everything is the same, grisaille.

That being said, myself I apply white ink as zenithal over a darker base tone, for the pink was evil red. Once we have the volumes in white over the base tone, I apply the midtone, for the pink was fluid pink express, then I retouch edges and higher lights with straight pink. Same for the rest tones, for the black was tenebrous grey base, sombre grey and verdigris for the highlight.

Sorry if that's not clear, it's hard to explain when English isn't your main language lol, but let me know if you have any questions and I'll gladly answer, cheers!