Here's what's in the works currently. The plan is to have a realistic bust of Vincent Price, with silicone skin, punched hair, acrylic eyes, etc. Should be a nice portfolio piece if it works out how I'm envisioning it.
I'm going for a "House on Haunted Hill" era Vincent.
Step 1: armature
The less the better, so it doesn't interfere with the proportions of the sculpture. The only reason to sculpt a head on top of another one is if it's going to be a mask.
Step 2: roughing out the sculpture
I use Chavant NSP Medium clay. This is a few sessions in. Still quite a ways to go.
Incidentally, if you're thinking about doing some sculpting, you may find my Fright Radio segment interesting: http://chickenhaunt.blogspot.com/2014/02/sculpting-tips-fright-radio.html