Combine and finish as the third man. Play into feet, support the lay-off, time the run in behind, and finish the chance you created.
As the base, but C plays A through on goal to finish. Emphasise the timing of A's run to stay onside and arrive in behind, and a composed finish one on one. Rotate the roles.
Fork it into your private drills, then change the animation, adjust positions, swap equipment, or drop it into a session block.