1/4" or 3/16" SK-75 (Dyneema, Spectra, Amsteel) is plenty slick enough you can eliminate the hard eyes or blocks in the lazy Jack system. Just a soft eye, made with a very simple double tuck brummell splice. It is one of the "soft solutions" that the super strong, super slick ropes can address.
I have just "built" a new topping lift from the same material. I used a new style eye for the block. Eliminate moving parts. This is the kind of tech. stuff that cruisers can use, most of it cam down through the race world....
I could not post photo's, so I attached them to the top URL below.