My big question is, how many different NPCs can you make?
Am I limited to ten NPCs? Can I make twenty versions of each, so different "Templar Squires" have different faces? Can I make two hundred individual NPCs, so every single minion in the mission has a different look and powerset? (That'd be a fun mission to play, not so much to write). And if the number of NPCs is limited, is it limited across mission arcs or across accounts?