Yes, maybe the most common mistake using arrangers live is having the vocal and/or the lead sound too loud. I'm guilty, but try to be aware of it at all times.
You just have to learn how to
SIT IN THE MIX....
it only comes from experience on stage night after night.
listening to recordings of your self helps alot also.
Here's a trick I always used on stage ...
if you can't hear the
"Hum Of the Crowd" your Too Loud.
Yep, I've been sitting in that mix for nearly sixty years!
I have recordings of myself starting about 1969. Started with reel-to-reel, then cassette and 8 track, then minidisc, stereo hifi VCR, and finally an array of digital, from 8 track to 2 track. Lord, I was awful back then. Sure glad I didn't know it at the time.
My first self-recording was when I had a Lowrey organ that had a built-in cassette recorder. I didn't sing at the time. I remember playing at a restaurant and recording the first hour, then just playing the recording back through the organ for the next set. When you played it back through the organ, it used the leslie effect, on and off, just like live. But if you tried to play it back on a normal player, it lost that effect. Hadn't thought about that in many years...