You can actually experiment with this now, if you’re willing to deceive your Pixelblaze a little.
Set your Pixelblaze for the appropriately ordered RGB (not RGBW) LED flavor.
This tells the Pixelblaze to just send 3 bytes of RGB data and not do anything involving W at all. But your strip will still want to eat 4 bytes per pixel.
So you’ll need to lie about the pixel count too, to account for the extra W bytes. Set it to (actual pixel count) + (actual pixel count / 3)
Now you can use the function in the forum post below which, given a pixel index, figures out where the r,g,b and w bytes will fall and lets you set them all independently.
Because of the way the math works out you may not be able to control a few pixels at the end of your strip, but this will at least give you a sense for how bright, how hot, how much power, etc.