PluraEyes can be a very handy tool when syncing dailies that have no timecode or bad timecode, etc. Because it works as an external app using an AAF roundtrip workflow, there are some tips and tricks that will make logging and organization easier if properly planned. Download the PDF. using-pluraleyes-to-sync-dailies-in-media-composer.pdf
As of PluralEyes v4, AAF is no longer a supported format, so all syncing will need to be done on original camera assets and not as a roundtrip via Media Composer and AAF. Refer to PluralEyes documentation.
Media Composer 8.5 introduced audio waveform syncing for grouping. For AutoSync, refer to this blog