I like your raptor idea. Personally I don't see them enough and it's a shame. I really like them. But I'm not sure if this is cheaper or more effective or any of that jazz but a small unit of chosen in a rhino with at least 2 meltaguns. They ca nstay in the transport pop tanks from relative safety and then let the zerkers attack. I personally prefer the rapot idea but I've seen that set up much more often.