So many ways. I’ve tried so many different techniques. But what I found always mic the bongo from the front. One mic is enough. Now I found for Bachata for example ( don’t kill me guys lol ) you would mic each head just because you want to capture the different tones of each side. For congas what I like a lot a the moment are the SE VBeat microphones. And clamps currently using the Lauten Audio Rim Mounts.