Puschkin's right... as usual... it's hard to just replace cards one-for-one. You can, however, modify other card choices to make up for the missing Voids. I don't know if you've seen this thread yet or not, but there's an example of a deck here that runs only two Voids.
Nether Void Primer part 3Unfortunately, I can't seem to find it at the moment, but I feel like there was also a version out there that ran only a single Void and played more like Suicide. I'll do a little more digging and see if I can find it. Until then, check out part 3 if you haven't already, and see if that helps you at all.