How Many Swift Strike Dragons to Kill a Level 5 Anthropus Camp?

Swift Strike Dragons are the fastest troop in the game, so if you can train a bunch of them and get lucky enough to win some Pack Dragons in Fortuna's Chance, farming for food from level 5 and above Anthropus camps can become a quick job.  10,000 SSD is plenty to kill a level 5 Anthropus camp and 20,000 should do the trick for level 6s.