Ok that's strange.. With Vanilla Skyrim, when i reload the game, a savegame just before the Bear in the Helgen Keep, it deals me about no damage at all, even on Legendary.. If I go from the savegame just at the entering in Helgen Keep, and go trough all soldiers and get to the bear, that bear, on legendary, almost kills me in 3 attacks (or less if powerful).. Someone can test/confirm this? With Vanilla Skyrim I mean, SKSE, all official DLCs and Alternate Start (option chose: I get caught at the border illegally)