Strike it first-time before the block. Time the run onto the square ball and get a clean strike away into the corner before the defender closes.
As the base, but a defender closes the runner. Emphasise a quick, clean strike before the block, timing the run to meet the square ball early. Both sides. Rotate the roles.
Fork it into your private drills, then change the animation, adjust positions, swap equipment, or drop it into a session block.