I raid in a high end guild, I see all the parses on longer duration fights and I know what they are capable of. A summoner who is bad can parse the same as a top end T1 player and a summoner who is good can double a top end T1 player. Even the summoners I raid with tell me how broken their dumbfires are so yes they are completely broken, it's obvious. Don't get me wrong I like their crazy op dps, it helps us clear raids a lot faster but at the same time I don't want to read people trying to deny they are broken. If you are a summoner and you are not dominating every parse you are doing it wrong.