I always get phase issues between LAV and BOOM
I use Auto Align Post from Sound Radix.
Now I can mic the LAV and BOOM to create a fuller sound.
Always use a separate track for LAV and BOOM, NEVER mix them.
Its been 20 odd years since Ive seen Doug Nelson.
Doug is a production mixer, that mixed post on his shows, amongst others.
I learned a lot from Doug, as his A2 in post.
Trying to find a way to reach him.
Star quad cables, jumper pin 1 to XLR shells on both ends.
Some might say this creates a ground loop, but that is only on the case of equipment to equipment.
It doesnt apply to microphones.
Ive been doing my own like this for years.
Label the cables as MIC ON:Y
If pitch shifting and slowing down, best to record in mono, and upmix after processing.
You will get phase issues doing multi channel pitch and speed.
If slowing down, best to record and sow down in 32 bit, or if you're 24 bit max, then 96K sampling.