Subtlety is the key when you have a devout spouse and you want to leave yourself. It's best if you do not do anything to provoke the elders into DFing you.
Basically, what I'm suggesting is that you let her be. Non-interference, non-confrontational. If you do or say anything that could be construed as hindering her meeting attendance, field service, personal study, it won't be long before your wife talks to the elders about it, and they have been known on occasion to recommend that a believing spouse separate from the spouse who is inactive, citing "spiritual endangerment". If your marriage is important to you, then shift into neutral gears.
Once things have smoothed over a little, launch Phase II: Work on your relationship with your spouse. Take her places on weekends (out for brunch, homeshows, shopping, movies) and just enjoy spending time together. Ask her to pick something she enjoys doing and do it together. It could be something incredibly torturous for you (like learning ballroom dancing ) but get her doing things with you, and meeting people outside the JWs.
Phase III: Once you've got some social contacts established outside, start expanding on those so that it entails missing meetings occasionally. Then gradually increase the frequency with which you do these kinds of things together, so that she's having way more fun missing meetings than she is going to them.
Phase IV: After she's missed several meetings, she's going to notice a distinct change in the way the congregation treats her. They don't phone to ask how she is. They don't talk to her as much as before. Some even give her the cold shoulder, like she's "bad association". Be supportive of her hurt feelings and reassure her that YOU know she's not bad.
Phase V: She figures out all on her own that JWs do not display the kind of love that Jesus said would be evident among his disciples. She starts examining things on her own (without asking for your help, because she doesn't want to admit that you may have been right all along) and eventually, she's inactive and wants out, just like you do.
Above all, be patient. It can take a long time to go through the process. Good luck.
Love, Scully