Oh dear. So to back up your claims that apps (in general, some, or what) do not use cpu efficiently you should show us some logs and give some information about your comparison between different setups. Also if you find that some apps might be using cpu not so efficiently then you should inform devels of those apps and not in general say that "some" apps do not use cpu efficiently. Install stuff one by one and monitor how they affect cpu/battery usage and report to app develeoper if you find something that consumes cpu or keeps processor wake when device is locked. btw. no need to install two monitoring applications (battery graph and battery eye)