optimus-manager is hacky and requires hacky things (such as edits to your display manager)
bbswitch is bumblebee and bumblebee conflicts with prime, and no bbswitch package exists as written.
(unless you are stuck using an old 300-series nvidia driver you should not be using bumblebee)
No idea about switcheroo-control, but if its for bumblebee then it would be considered deprecated.
Looks like it may be deprecated one way or another. Because this is a 404:
https://developer.gnome.org/switcheroo-control/
If you must have a switching utility like optimus manager then at least use a reasonable one;