Thanks! HunterK actually already combined the two- see “How to combine shaders”
So far, I think this is the best compromise in terms of brightness and objective picture quality. The scanlines and mask effect cause so much brightness to be lost that you have to compromise on either brightness, contrast, color accuracy, or mask/scanline strength/accuracy. This is true even on brighter LED-lit LCDs; the display I’m using reaches ~400 cd/m2 with brightness and contrast maxed out, and it’s still not enough. For what I’m trying to do, I think you really need HDR, or at least an HDR-capable display.