A few days before I saw “The Conjuring: Last Rites,” a friend of mine asked me about my plans for the weekend. I told her that I planned to see the film, and I was excited. When she asked me why I was excited to see yet another entry in the generally middling “Conjuring” series, I blurted out, “They make such a cute couple!” “They,” of course, being Patrick Wilson and Vera Farmiga as real-life paranormal investigators Ed and Lorraine Warren, respectively. These fictionalized tales of their cases sell themselves on demon- and possession-related horror, not charming family dynamics. Yet whether by design, by accident, or by default, the Warrens as characters are what this series does best.Take the opening scene, set in 1964. Ed and a pregnant Lorraine investigate the usua
