I know my example is big blocks, and most sim-process is not, but I think it gets my point across. Again, very
image dependent,
Yep. In which case when I've had a sim process with large elements of blocked color, these would often get separated as spot colors, preferably vector layers on top of raster. In these cases I'm not afraid to go to the mat with added colors and/or halftones. I've also mixed straight wb and discharge ink occasionally for this on mid-tone shirt colors. The straight wb ink handles the halftones, and the discharge handles knocking out the big blocks of bright stuff.
Image dependent? Oh yeah. Isn't everything?