When building your Devout army with a Charnel Golem, you currently may start with only one as long as you have a Warped Lord in your force. When we see the Visceramancer, you may take more than one, but the build still conforms to the one individual to one squad ratio that we know and love.
Now for absorption, Ole Charny must kill six of those militia, and take an action each turn to absorb the two it kills each turn, to get that six sided die up to the number six of wounds absorbed. After that, it will split into two Golems, both starting at 3 wounds.
It is possible for the Charnel Golem to split into two on a really good day, but remember, it only absorbs models it kills itself. It can't deliver the death blow to a Totem that's been wounded by a squad first, and then absorb five wounds.
Also, the numbers absorbed may differ from what I just wrote, as the Golem may spend an action at the beginning of the turn to absorb, as laid out in the original post/pdf.
For those wanting the playtesting pdf, let me know here, and I'll shoot you a copy, or just go on over to Coki's Chronopia World and print yo'self a copy.