You mentioned this is for a church, so here are a couple Scriptures to think about"
Prov 1:5 Let the wise hear and increase in learning,
***and the one who understands obtain guidance
1:7b fools despise wisdom and instruction.
I wouldn't call insulting me and calling my worship team incompetent to be "wise instruction".
If I get some splitters, I'll be able to adjust the gain at the board all I want and it won't bother the people on stage. That way they can control their monitor mix and I can focus on making them sound good in the room.
I don't know why that would be a waste of money. Sure, it's not completely necessary, as we've been getting by with our current setup. But why just get by?
You guys can say all you want that I shouldn't be adjusting the gain levels but I simply cannot mix effectively without doing that. Neither can anyone else on the sound team.
And I absolutely do not like distortion coming out of the mains or going into people's IEMs, so if a signal is too hot, I'm going to turn down the gain.
There are some instruments where I hardly ever adjust the gain, like the keys, synth, bass, background vocals, really the only things I adjust the gain on at all are lead vocals and guitars.
The guitarists have an assortment of effects pedals that all have varying volume levels and they don't always do a good job of making them all even beforehand.
I also very rarely adjust gain during the actual worship service, I usually have that all set beforehand. Sometimes those guitar players like to surprise me though.
When I get there, we immediately start rehearsal and work through the song set, which is when I set everything. We don't do a line check beforehand or anything, we jump right in. So while I'm making those adjustments, sometimes it affects the IEMs. That's when we have to stop and fix the monitors. Then we get going again.
Having a pre-gain send to the monitors would eliminate a lot of the hassle we go through during rehearsal. It would mean the band was completely in control of their monitor mix and nothing I did would affect it.
And that is why I believe it would be beneficial for my church if we got some splitters.