I tend to prefer absolute, as it represents a consistent cheek weld.

I also have my BUIS off most of the time. As a result, it is possible that I don't really have an absolute OR a lower 1/3.

I have a Vortex StrikeFire I on one, and it comes with the riser. On another, I have an inexpensive reflex sight on a .83" UTG riser IIRC. Both allow comfortable cheek welds.