This argument is invalid. ANY dragon locked into Outrage is screwed against Ferrothorn since at best it's getting Iron Barb damage + Thunder Wave and at worst it's getting 2HKO'd by Gyro Ball (Kyurem-B has low speed and high physical bulk, Gyro Ball won't OHKO most of the time, meaning it's 2HKO'd like the other dragons who have higher speed and lower defense). Nobody in their right mind is going to use Outrage when Ferrothorn is still around, so please let's not gratuitously say that Kyu-B is "bad" because a someone thought it was a great idea to use Outrage knowing full well that Ferrothorn would come in afterwards. And Kyurem-B is still going to do massive damage with LO Focus Blast or HP Fire outside the rain. In fact, Ferrothorn is not a safe switch in against ANY OU dragon, which is really bad considering it's a steel type.