What kind of microphone phasing are you speaking of? Stereo microphone and their different techniques that utilize phase manipulation?

Or, what to do when you have more than one microphone open next to another microphone that's also open and you get that terrible cloudy sound?

For that there are a couple of suggestions usually followed. Try to keep them at least 6 feet apart in distance.

If you can, insert a noise gate.

Put them on a stereo compressor so they track together.

Reverse/invert the phase of one of the two microphones.

Ride your levels aggressively.

Don't use too much compression and/or limiting when in that kind of situation. It only exacerbates the effect.

Phasing out at 5:25 a.m.
Missouri mandated