Hey B Macrae,
I work with DSLR dual sync sound and have found syncing in pluraleyes and exporting the XML out to Pr to be very convenient. Once you have a sync sequence you can nest your selects and takes from the timeline, to create independent "clips" of the original audio and sync audio. When you need access to all additional tracks when editing from the nest you can assign the audio source from the nest to individual tracks (lav1, lav2, etc....) The marker system is a great way to log your footage with dual sync sound. I have yet to find a way to do what your describing with the multitrack audio merged to a video clip and have access to it in Prelude. After spending alot of R&D There is an option in Pluraleyes to export video with replaced audio, but haven't tried it with more than 2 channels of audio. There has just been an update for pluraleyes that mentions "Now properly supports audio tracks with more than two channels." If you do i'd be interested in how that turns out for multi track audio.
Thank you for the reply,
I have not found any information on pluraleyes supporting more than two channels. Where did you find mention of this update?