Maximum Crypts are my favorite, and capturing them for any Castle on day 111 is usually quite easy (except for Necropolis), unless the starting army is really bad (it's a bit harder for Inferno, if there are few Gogs, because Imps are not good warriors, unless you're Ignat))). Capturing them for the Human Castle is a pleasure. If there are no Griffins or other fast units to match the speed of the Vampires, detach a couple of single Archers, and that's it! Even if there are few Archers, the detached units will block the Vampires, allowing you to shoot them down without problems while the other units deal with the Witches and Skeletons. If the Crypt is not a maximum one, the single Archers will remain intact.