naw it was pretty easy to kill it myself... I just pulled out a bow and hit it with Weakness to Poison and Damage health + Lingering Damage Health poisons and 2 dremora lords it took quite a few hits to go down though because Legendary difficulty and Deadly dragons set to insane :/
Just hide in the tower until Whatshername kills the dragon, since she's a godmode NPC. Takes a while, tho.