I hope this article will shed some light on how to go about setting an in-ear mix that is useful and encourages your band to get tighter. These are a few things I have noticed over the years that may help set you on that path.
Intentionality of Audio in a Worship Environment
Audio is simply the medium by which music is conveyed. In light of this, for a song to have its intended effect, every aspect of its transmission from source to audience must be intentional.