IMHO, it really depends more on the stage set up, location of musicians, amps, drums, etc. Frequently, no one "classic" mic config is necessarily going to work in an on stage setting. If the stage is not very deep, and the drums are right there in your face, you are going to have difficulty under most circumstances. If you have the option of splitting the mics, it can many times produce a much better recording. If there are a lot of vocals, and you care about capturing them, unless you can get your mics far enough in to pick up some of the monitors, you are better off further back.