I'm running ART as well. I used this little app https://play.google.com/store/apps/d...systemappmover to convert play services, search and maps, amongst others, to user apps. After that, I could just greenify them. The apps still work, and are just greenified automatically when the screen is off for a few minutes. As you can see below, there are no more wakelocks!
Sent from my Nexus 7 using xda app-developers app