For the supernatural angle, I'd say that you might want to have contacts in one or both of the fey courts, someone moderately high-up in a smaller ghoul clan, a couple of Kincaid-style "specialists," maybe one of the shadier wizards on the Council, and possibly one or two people on the White Court who don't completely hate you.
Also, if you get in a situation where you're dealing with a group you didn't put on your list, I've found it helps to ask the GM if you can make a Contacts declaration that you know someone there.
