So, the thread title asks about HD (home defense?) shotgun slings.
The majority of my long guns (shotgun or AR) have an adjustable two-point sling on them. More oft than not either the BFG VCAS or Sierra Tac's adj 2 points. I've got both Grey Ghost and LFT slings here as well. The exception to this was when I was still working & had an issued 14" 870. None of the slings, when paired with that gun, would keep it in a muzzle down orientation. They all wanted to rotate so it was parallel to the ground. Switching to a single point for just that 'gun worked out.
However, if it is for a home defense gun, I probably would not have a sling on, except for training or classes.