Ghouls

[thejeff]

But even in a huge game you're still trading 4rp/turn for 5 ghouls (at best).

Early on the 4rp/turn could be important. Later the research will matter less, but the power curve has gone up far enough that a couple of hundred ghouls (40 turns worth!) are basically irrelevant.

The game may not be over in a huge game, but power levels increase faster than the number of ghouls. 5 ghouls/turn never catches up.