My experience hanging Kinos from scissor clamps is not good. The weight of the Kino would torque the clamp, and it all felt pretty sketchy.
A safer alternative to scissor clamps when hanging heavy(ish) fixtures is to remove a ceiling tile and place a 12" piece of plywood, the same length as the width of the tile, across the width of the opening. Screw a baby plate into the plywood and you're good to go. A safety cable to something solid is still an excellent idea.