As you noted, every audio situation is different and therefore there is no good set of settings that always work. Honestly using someone else’s settings can easily result in worse results than simply keeping the settings stock.
The easiest way to handle this is to multitrack record one (or more) of your church’s rehearsals and then use “virtual sound check” by playing back those tracks at another date/time when you do have time to try new settings and see what sounds the best.
Virtual SoundCheck with Qu / SQ