I guarantee that a bear who knows their range very well would be able to tear through that strategy. It is possible to land scream and still be able to get in stomp-sms. And anyway, why throw in an 8m skill AFTER you send them flying with pull-stomp-sms? Just doesn't make any sense.

Also, hell scream is LEAST effective against mages; they can just heal it off if they know to save their heal (and the good ones do).