My approach is similar to what’s been said----use of basic styles and voices that fit the song. Most of my gigs, now, are less dancing and more dining and listening music. As stated before, I’m a guitarist that stumbled into arrangers a few years back. Hence, I split my gig time between the S970 with vocals, as well as Band In A Box, with vocals and guitar. These two approaches tend to keep things fresh for the most part. I decide ahead of time which instruments to use. It works well most of the time.