Thing is, cutting doesn't thin. If a horse already has a thin mane, cutting strategically will be okay, but if it's thick it looks like poop cut no matter what.
I'd roach or pull, honestly. I prefer pulled manes myself, but I do show so it's kind of mandatory for me and Jack. It looks great though and shows off his neck nice.
Cinnamon Whiskey 11 y/o 15hh Chestnut AQHA mare, 2'6 Jumpers