I agree the nerfs make the comp dependency a non issue for spine at this point, but we were progressing on both fights it prior to the nerfs and we were on the third plate within the first night of attempts for heroic spine in my 10 man. Overall Warmaster was a bitch due mostly to RNG and fire bugs for us, while spine was much more of a controlled fight, making it easier for my group by a large margin, but your experience may vary.