Same issues here mate.
I turned wifi off in sleep. Loads less wifi battery useage.
Turned location services off for Google search. Google search and ads does far too much geo stuff in the back ground.
Increased screen timeout to 1 minute
Turned on smart view
Turned off air gesture as it keeps turning the screen on in your pocket.
And as a result I seem to be back to normal battery use as before kit kat.
Also installed elixir and the widget which allows you to keep your cpu use percentage on the notification tray. And keep track of what is killing your battery.
For me it was Google search (in the background)