Admob Conflicts with Google Play Services

Unity version : 5.2.1p4
Android SDK platform tools : 23.0.1
Android SDK Build tools: 23.0.2

i followed the instruction for admob on this tutorial Admob for Unity Android Tutorial - YouTube
and it works fine. admob banner shows properly
but as i try to implement google play services for leader boards banner no longer shows and ads no longer requests as the game starts. i knew it dosent request ads because as i use log cat it only shows something like this
Pixelkits-Mini:MrtJam3D Pixelkit$ cd /Volumes/Macintosh\ HD/Users/Pixelkit/Desktop/android-sdk-macosx/platform-tools/
Pixelkits-Mini:platform-tools Pixelkit$ ./adb logcat -s Ads
--------- beginning of /dev/log/system
--------- beginning of /dev/log/main
Pixelkits-Mini:platform-tools Pixelkit$ ./adb logcat -s Ads
--------- beginning of /dev/log/system
--------- beginning of /dev/log/main

tried it many times but ads dont show tried removing google play services and it works fine

uses gps version 0.9.27 (GitHub - playgameservices/play-games-plugin-for-unity: Google Play Games plugin for Unity)

0.9.27 removes the google_play_services_lib which is needed for Admob on Android.