Now that I've played a few games, and been to a couple of tournaments with my Cult, I wanted to stop obsessing about lists, and set out a few thoughts on the units I've used, and how I use them.
Bear in mind, I run a pure GSC army, using the Insurrection Detachment with a Brood Cycle and 2 SubTs. So, loads of units and loads of bodies. My thoughts need to be viewed in that context. If you run a different style of GSC army, "your mileage may vary".