I hit some of my most effective high 1hbh slices using a conti grip with a half twist towards eastern FOREhand! Hit late, leaning forward, stance well closed, I can swing as fast as I can, impart heavy sidespin in addition to slice, the ball clears the net by 3' and drifts to the baseline with an exaggerated skidding effect.
Then again, it's much easier to hit the same high ball with a strong eastern backhand grip, taken every early, and that grip allows a more controlled and slower swing for effective pace and depth.