Since official for 5.x version only for ARM platforms, so younger self synchronous android-ia part of the source code and shakalaca change program a little , compile a copy to ZenFone 2 used Xposed Framework.
Download Xposed Framework For ASUS Zenfone 2
Enable USB Debugging>Connect Zenfone 2 to PC/Laptop>Double Click Install.bat (or install.sh) to install.
pay attention to the official or alpha version, so there will freeze bug will crash phenomenon is very reasonable