With Notifly, you dismiss a notification just once, so you don't have to dismiss the exact same notification again on another device. For this app to work, you have to login using your Google+ account from all of your devices. After login, you can disable notification dismissal sync for specific apps, in the case that you don't want to lose notifications from it on a certain device.
There's not much more that I can tell you about the app, but I invite you try it, and maybe share your thoughts on it. Feedback and suggestions are highly appreciated.
Google Play Store link: https://play.google.com/store/apps/d...e.notifly.free