I'm goign to guess that it's one of my Secret weapons, the AKG D330 BT. Amazing Mic, combined with a 57 makes most amps shine except for those that have no chance of ever shining. Strong for vocals, fantastic for acoustic guitar, not half bad on bass or kick, steller on snare, I've used it as an over head before and wasn't upset by it.
I guess we each have our own methods. I can't imagine needing 15 mikes for anything that I would want to be involved in. If I need to use 4 mikes at once, I'm put out. That's why I have four of my secret weapon mike over the last decade, the RE-55. Only difference is I'm not hiding out.