“Deadly Illusions” (*1/2 out of four) was a swank but slack suspense thriller about a best-selling female novelist (Kristin Davis) who finds out her husband (Dermot Mulroney) has lost most of their money and feels pressured to come up with a new best-seller even though she has writer’s block. Upon hiring a new nanny (Greer Grammer), she then begins to luridly indulge the thoughts and twists of her novel as the line between reality and writing get blurred. Luminous lighting and photography can’t save this from being a deadly dull dud. Don’t have any “illusions” of renting this expecting any scares or thrills.