Achieving Off-Center Focus with Canon 6D Focus Points?

Attached is one of the photos taken by loyanzi from Flickr.
I'm on the way to get Canon full frame system this year.
I was considering the 50mm f1.2L and 135mm f2 L.
Now, I do not have the budget for 5D III after 50mm f1.2L, but then again, that creamy bokeh is just astounding from the 50L.
I have also considered a Nikkor manual AIS 50mm f1.2, but the bokeh is a "little" harsh, just a little.
So, I was thinking about 6D either. Later, after a few years upgrade to Mark IV maybe.
Maybe you get used to the 11 point focus in 6D, but how did loyanzi achieve these focus? I know the focus points layout from 6D.
Are these the far left /right focus point mostly, or, did loyanzi use manual focus override?
Or maybe just crop it down?
What about focusing "on the eye"? What would I do with a Canon 6D?
I have heard NOT So FAVOURABLE things about "focus and recompose".
*I have asked loyanzi. I haven't got a REPLY yet. I just want your opinion. I'm deciding between lenses.

You are way off track here!
You are looking to buy an expensive system just to take differential focus photos.
In fact, ANY DSLR will achieve this for you.
You just have to have the right lens (not necessarily an L series) and the skill to know how to use your camera.

There are 3 ways to achieve off centre focus.
1. Frame the shot, look where your focus wants to be then change the autofocus point to coincide. This is time consuming!
2. Use manual focus
3. Set your camera to the centre AF point. Set your subject centre frame and focus. Lock the focus, reframe and shoot.

I use mostly method 3, occasionally method 2, hardly ever method 1

I have a 1986 Canon EOS film DSLR that has (eeek!) just 1 AF point, centre frame. That really is all you need to get results like you have shown.

"I have heard NOT So FAVOURABLE things about "focus and recompose".

Really? I would like to see some of those things.

For ages, auto focus cameras only had one (center) point, and focus, lock, recompose was how it was done, and very effectively. I have used that technique for ages, and have never had any problems in MOST situations.

I will say that it "can" give a problem if you are shooting a macro at wide aperture and extremely shallow depth of field. The change in position of the camera / lens could result in focus not being where you set it centrally before recomposing. In such a situation, I always use manual focus in such a photo anyway.

In any other situation, a gaggle of focus points on a camera is worthless to me. I have only the center point selected, place it on my subject, half press to lock focus, recompose, take photo. Perfect result.

I suggest you try it before basing your judgement on "what you have heard".