Any of the above suits me fine. I don't particularly care about the amount of suffering as much as I care about getting rid of the traitors themselves, nor do I get any particular pleasure from seeing people tortured.
Having said that, being eaten alive by a wild animal would be kind of nasty. Not torn apart by something like a lion, which would certainly be unpleasant, but relatively quick. I'm talking about having a bird of prey pick at your flesh until it's full, then go away and come back for more when it's hungry again. Done properly, it may take days to die. A real sadistic individual would treat the wounds of the traitor after each meal, making him last perhaps for weeks.
I may need to rethink my above statement about not enjoying torture.