I also use CCleaner, but with one caveat. I only use the registry cleaner after I uninstall an app to look for leftover stuff. The regular cleaner portion, generally with default settings, does a good job, but the registry setting can cause problems if you are not careful in what you remove.
50 Gb is a great amount of cleaned space, esp. on a 128 Gb SSD. Yes, the system does use the amount of installed Ram to set the Pagefile size. With that much Ram, I would think unless you have a lot of extensive multi-tasking going on your PC would not ever use the virtual memory. 32 Gb of Ram is HUGE!