Thanks for the input.

I'm fine with flat molding but am totally unable to cut crown without wasting 2x
as much as I end up with on the wall.

Due to the height, and lack of skills, I'll hire a guy with a scaffold.

Any more thoughts on what if anything to do along the apex of the ceiling?
Last house I had we screwed a 2x6 front to back along the apex, then nailed on
rough sawn cedar for a boxed beam look. This time we want something more
contemporary.