One of the pro engineers in our church once showed me his plan for the service for just the bass. He had 3 different cab sims ready for the bass for different songs (we are on IEMS) based on how the bassist played them, this was on top of the eq work. I was amazed at the detail and care he took - and speed he did it at - really getting the best out of the amateur musicians on the stage.
Our team do workshops on tech too, such as mic technique and how to choose what to have in their IEMs and is now doing workshops for the different groups in the musicians teams eg rhythm section, vocals, brass and keys etc.