I would agree that there is probably a particular set-up to kill Jason. In the movies he "dies/gets defeated" at the end, and it often involves him losing his mask. I'm guessing that if the movie trope holds true in game, Jason can probably only be killed when he is at his strongest (Rage is active) and he has lost his mask. I don't think Tommy is a factor since he isn't the only person to beat Jason in the films. Beyond that speculation I'm not entirely sure. It may in fact be "Nintendo Hard" to take him down.