Now that Dresden possesses the actual burial shroud of Christ, he should let Marcone see if he can use it to help Amanda Beckitt.

If not that (and perhaps better yet) Nicodemus has Dierdre's coin. If Nick knows about Amanda (and his Fallen could surely find out) then maybe the coin could wake her up. What a good way to get revenge on Marcone. Fix Amanda and send her to kill him.