To add my two-penneth regarding run-on speed and ROD; 1500fpm is about 15kts downward, 500fpm is about 5kts, 200fpm is about 2kts etc etc. Therefore, after the helicopter has broken its contract with you in such a major way, a relatively high RoD at touchdown is probably preferable to a high-speed run-on as the overall overall inertia, and therefore bone-breaking forces, will be less.
What about flaring to zero-speed? Not a recommendation; but a genuine question?
J