I have to ask how do you use the them and any particular reason that you prefer Voids over Rod? Flexibility?
Basically, yeah. In most lists, I would recommend people go with Rod, however in my list, I need them to be flexible enough to fulfill anti-AV14 duties, as well as efficiency against things like Wave Serpents, that Rods can take, but not nearly as well as
VB/
PC can. Rod's particular niche,
TEq, is generally filled by my Flayed Ones, or a combination of Flayed Ones/TPs/Wraiths, if need be (but who runs that much
TEq these days

)?