Some rooms have extremely weird acoustics and ringing sounds. In those cases, I might deaden the drums a bit with some gaffer tape or moon gel. Sometimes I put a little more padding in the bass drum because the low end is getting out of control. Sometimes a different microphone or microphone placement could be the solution. There are times where the cymbals could be too bright, or too dark. Maybe the stage is tiny, and everybody is standing way too close to one another. I try to adapt my sound to the size of the stage, the size of the venue, and the amount of people on stage and in the audience. There is no one thing that works all the time. And there is no perfect solution to every problem.