I mentioned this much earlier, but I've done more testing and improved on it since.
Against any wall that has an upwards slope (Meaning the floor by the wall is higher than the floor where you're standing) can allow Nyo to land 1PP > 7KP after a wall splat.
For instance, in the Depth stage, every single wall with the red barrier allows for this combo, but only reliably on midweights (specifically the characters with the slightly larger bodies). I'm assuming their hitbox pushes Nyo back far enough for her to be lower due to being further off of the raised ring that wraps around the edge, but I don't really know or care. The point is, it's consistent against midweights and finicky against lightweights on that stage, though 1PPP+K > H+K will connect well enough, and it also loosens the window for her 1PPP+K > PP > P+K to connect, making that combo easier to pull off.
This also works on many walls in Hotzone, Lorelei (for the lowest portion, it's consistent for midweights but finicky for lightweights yet again unless using the wall with the windows facing outside as well as the gates on the inside wall), Scramble after tilting the stage, and any other wall with an incline or raised floor right near it.
It's not the most important thing, but it's an easy way to maximize wall damage.