Something else I just say in WoJ, confirmation that Molly's kidnapping and related events were indeed ordered by Mab and the Fetches weren't freelancing:
Ask yourself why Mab had Molly brought in. What chain of events did that set in motion? What secondary effects came about because of it? Ultimately, Mab can always go to the Wyld and draw in more muscle to replace fallen thugs. If worst comes to worst, with just a few "seed" fae, she could rear up enough Changelings to repopulate her cadre within a human generation or two–nothing, to a being thousands of years old.
Nihilus could kill everyone pretty quickly. Including the lesser akuma though, so the greater one may hold back.