I have been trying various slingsover the years, I find three points are redundant and unlike most 2 points they can't easily or quickly be converted to a one point sling.
of the two point slings I find the BFG and VTAC slings to be the best, with good qd hooks on both ends they can quickly tramsition from two to one point slings.
Of the one point slings I find the best to be the S&S sling, no bullshit just a straight up sling. When used with a sling hook it is my favorite sling setup.
However just beacuse something is my favorite sling setup dosen't mean I like slings, I prefer to roll unteathered, no sling at all, granted it means I have to do one handed transitions, I still find it the best way to roll.
If I run a heavy weapon a large loadbearing carabeaner about shoulder height on my left side allows me to hook the carry handel onto my kit almost as if I were running a sling.