So I always arrange everything live. So before the gig, I make loops as audio files so I don't need any plugins and then I arrange these loops live, so it varies from gig to gig and I never know before what I'll do and how long I'll play. I usually play a synth live with keyboard or pad and modulate the sounds live as well.
Why play so many live musician stereo files remains a mystery to me, because they really can not do anything live anymore. I've seen many live acts just starting their project in Cubase, Albleton Live or Logic and then doing nothing for over 2 hours. To be honest, that's not a live act for me.