I do all my pulls as fast as I can- everything from 135 on up. Sometimes, I'll go lighter pulls without going up to a heavy work weight. When I do, the approach is usually clusters of three (not really "sets" because I'll reset between reps), pulling from a small deficit, with each rep yanked as fast as possible.
My "sweet spot" for these seems to be right at 495-515 or so- with 545-565, the first rep usually feels slow and with 585-605, all the reps feel kind of slow. I have done these with bands, but since I am going for lots of speed from the floor, I usually prefer to use a heavier bar at the bottom without the top-end overload.
While I partially do these speed clusters to keep my speed up on max pulls, it's mostly a weight/volume budgeting necessity because I am saving my mojo for pulling heavy the following week or I just squatted heavy and I am too whupped to do full-range heavy pulls.