I have watched and worked with some good, experienced climbers who take down a big chunk in the following order (leaving out what they are doing with personal lanyards or flip lines):
tie in life line above where the cut will be
make the face cut
tie rope to chunk and run through pulley (if rigging it down)
untie lifeline and let it hang or retie below cut
cut back cut
For me, I NEVER have my life line tied above my face cut. Too many what ifs in my mind. These guys swear by it because it is another point of attachment, and at a nice angle for support, to avoid that (I could fall over backwards feeling) when cutting at waist or shoulder height with just a flip line (or two) below).
BTW, I always have two wire-core flip lines, one just below the cut and one lower down. I have my harness waist strap very tight -- I always seem to tighten some more once I have been in the tree a while. I guess then I.m less likely to fall out of it, upside down or not!:msp_smile: