Repeat for a few reps, then switch players around so that everyone gets practiced in all positions; bear in mind that the front of stack has to run further than the back of stack.
This drill works on repositioning the vertical stack in response to disc movement across the field.
A handler, A, starts with the disc near the sideline. A reset handler, B, stands perpendicular to A in the middle of the width of the field. A third handler, C, stands on the far sideline level with A and B. All remaining players start in a stack, with the front player, E, no further than 10m from the disc, and the stack angled away from the disc.
A > B > C > E > F > G > H