Hi @GMB1980 
Welcome to the forum!
Like @Stacy2 , I absolutely recommend a GOOD suction toy to compliment a wand. It’s a totally different sensation, so if your wife has become too used to the wand, a suction toy will completely switch it up.
Here are my reviews of the Next and the Melt 2 and I can’t recommend getting one if these highly enough. My personal favourite is the Melt but I think different shape clits favour different suction toys. There is a reason why the premium ones often pair with the pemium price, though. Any questions not answered in my reviews, please feel free to ask.
Another very effective clit toy is the Zumio E, which I haven’t reviewed yet, but really need to. This thing is really easy to use and soooo powerful. It’s not like a regular buzzy vibrator, it oscillates. You’d think that wouldn’t be that different and it’s hard to describe the difference but it doesn’t numb like a buzzy vibe does. Don’t set it too high and touch your vlit though as you’ll leap out the window if you’re not prepared! 