Sure and I try to go by experimentation, but also trying to go smart about it.
If we can kill them unhatched and skip the whole plasmid firing step that sounds good to me.
But if that means having a cyst full of mercury that will pop at an unpredictable time, maybe it's better to just kill the ones already hatched.
Sorry if I ask too much, there is no source I can look this stuff up..no luck with dowsing so far either.