His ult in Shadow assassin does no damage. I know this'll be downvoted by sour people who think he's broken; he isn't. If anything, he's underpowered. His ult scalings in shadow assassin should be buffed because playing him in shadow assassin form doesnt even feel like im playing an assassin.
Note: A lot of people are misinterpreting my post. What I mean is, It would have been fun if going into shadow assassin form actually made him an assassin, but giving him bonus movement speed still makes him a fighter. The only difference is, Rhaast does max hp % and shadow just provides him with a horrible scaling