Possible to use Dropbox and Bonjour?

I’m using Dropbox to sync DTTG but it’s slow. Would it be possible to also use Bonjour to help speed up the initial sync? Can Dropbox and Bonjour be used simultaneously?

As far as I know yes, that’s possible.

Syncing by wire would be the fastest, see DEVONtechnologies | How to Sync by Wire

Yes, this is supported.