new expansion new strategies

By James Dove, in Chaos in the Old World

hi guys I've just bought the horned rat expansion and I'd like to ask you what are the best strategy to follow with the new god's cards and powers. What's happened to my old gods? Can Nurgle win with the wheel?or khorne with the VPs?is it better to take the blood cultist upgrade or the bloodletters one?ciao ciao JD