Although the TTL auto focus is not real great for portraits with my 6D2 using a wide aperture and longer focal length lens, because of the jamming of the focus points towards the center of the frame; using live view with Face Detect seems to work.
I sent Rudy Winston of Canon USA an email telling him of my problems. He stated that I should be happy with Face Detect AF in Liveview. This will allow me to use my Hoodman Loupe and therefore be able to see the LCD in bright sun. It seems like I don't have to select the eyes using the touch screen because the Face Detect will hone in on the eyes. It appears like that works just fine.
I don't own an 85mm f/1.2 or f/1.4 lens but I do own a Canon 85mm f/1.8. I played around with face detect from different distances and angles with my favorite and very patient model. All of the shots at f/2 seem like they are focused quite well on the eyes.
ISO 100 - 1/100 - second f/2 - Face Detect AF
When I shoot so that both eyes are not equidistant from the lens, the camera focuses on the nearest eye.
I could be reasonably happy with this solution to my problem since I have a Hoodman Loupe to use in the sun along with the elastic cord to attach it to the camera. Thus, no extra money is needed...
Dirkson of Dirkson Photography ( https://www.youtube.com/watch?v=IsJV0AOi12o&t=4s ) uses a Canon 85mm f/1.2L lens on his 6D2 and uses Face Detect Focusing. He also assured me that "the eyes are where the camera goes" in Face Detect with the 6D2.
If he can do O.K. with the 6D2 and 85mm f/1.2L lens, I should be able to do O.K. with Face Detect on the 6D2 using my 85mm f/1.8 lens. I just have to get a human model. My wife says that her hair doesn't look decent...