Don't just run in, approach slow and low to ensure that the mark is effective
One way to get more throwing (and less running) is for each thrower to have a set number of goes before rotating: 3-5 works well.
If you have a skilled group, to consolidate this drill better, tell participants they are not allowed to throw above the mark’s arm. This limits the amount of bad quality high release or overhead throws.
Can decrease the stall count from 10 if the group is doing well.