I'm sorry, I just don't buy a robot being able to mimic/steal the Spectre's power, regardless of what level he's currently operating at. Or harm a spirit in any meaningful way.

Same for John Constantine's magic, actually. I suppose it could copy his knowledge of occult rituals, but would those work if enacted by something that's not a living being with a soul? Can a recording of a ritual conjure up a demon?

Diana and the Marvels are a bit more of a gray area; their powers are mystical/divine in origin, but they're mostly enhancements to their physical capabilities. I can see robots being able to duplicate those physical changes.