There is this beautiful thing about arranging. You listen to it 10 million times and make changes over and over until it feels like there is nothing left to do. You take seriously any change or doubt that might materialize.
If later it sounds like there is too much bass or not enough piano, do it again with less bass and more piano. Whatever you realize, you address….over and over.
It couldn’t be easier than today when people have access to what in yesteryear was maybe $40,000 of equipment replicated in $200 software plus you can record in your bedroom or in a taxi or in a stairwell. There is no excuse to not indulge every whim and since everyone now has the tools it’s totally about talent whereas previously it was more than 50% about privilege.