TABBED LIVE SETS.
For a performer, it would be optimal (before going onstage) to open up a set list of songs as TABS (live sets), each with their own clips, mixer/effects settings, and virtual instruments.
Then for every song you simply click the next tab and you're ready to go!

This would save time loading every song, etc. This would work well for DJs too, perhaps allowing you to blend audio from one Live Set (tab) into the next.