Hate to tell you OP, but you're wrong. The boss is ALL about skill. It is also about knowledge of the fight. You have to know how to dodge, when to dodge, and when to pump Nim full of lead (or shrapnel, or energy).
How you can possibly beat him and say its NOT a skill based fight is just astounding to me. His charged up huge damage dash? Skill based dodge. His phase 3? All about quick reactions and controlling your position in the environment. You have to learn the fight to be able to make USE of skill in it, but that's normal for ANY game. Once you learn it its very consistent and its still challenging.
All in all one of the best experiences I've ever had in a single player shooter game.



, Roll is your best friend in this battle and you should use it as much as possible.
