I think I have found, it depends on you, and what you want. Depends on anchor point, face shape, head tilt, back tilt.

I have found I like anchor on my K-9 tooth, for that with my long head and the way I like to position my body in a sneak like position, I need an extreme cant. Like 2:30 position. Part of the issue is I am left eye dominant so for instinctive shooting, I think I have found my position I like.