Implementing AdMob with Google Play Services on Unity3D / Android

Has anyone got Google Play Leaderboards working alongside AdMob ads in Unity 4.3 for Android?

I've been wracking my brain for a few days on getting google play services (which I have working for leaderboards) implemented with my Unity3D game, you can play the version 1.1 here, for 1.2 I want to have interstitials with google play leaderboards.

https://play.google.com/store/apps/details?id=com.JohnRussellErnest.HeroBird

I have leaderboards working fine actually, but since it has its own implementation in the JAR files in google-play-services.jar\com\google\ads and the AndroidManifest.xml file has its own set of intricacies that I've tried to follow along in the docs but now banner and interstitial ads don't work at all after removing references to the libs by https://github.com/googleads/googleads-mobile-plugins