i would take the time to link the audio & video.
working from nests is not a good idea (you lose your original TC for starters)
you can easily put the content of all your synced sequences into a single timeline by dragging them all into a new timeline while holding Apple (Command)
how i've done it in the past:
select all the browser sequences you need except one
hold Apple (Command)
grab the last sequence
drag to the timeline.
now all your original clips are in a timeline and you can go though, select pairs of Pic and Sound, and LINK them with Apple L
then drag them all into a new bin in the browser, and you can start editing.
nick