on this blog: JSAMN crossovers and nothing else, for some reason

No, but: it's surprisingly easy to cross-cast Sweeney Todd with Clarke's characters, if you go loosely and start with Todd as an uncharacteristically active, go-getting Norrell. Lovett as Childermass, Johanna as Arabella, Lucy poss. Emma Pole, and Anthony becomes the silliest Strange ever to go 'wigmaker' rather than 'eternally grimdark'. Cue final scene in which Todd slashes his loyal, dark, mysterious, pie-making mistress across the face with a razor and runs off with Anthony to start a cosplay boudoir. 

...

Look, this is why I don't post much. Except on Tumblr, where everyone gets this kind of life-altering revelation dribbled out to them at a rate of one three-word text update per minute.