All you people have no subtlety , just blurting out Pokemon with 800 attack and using 200 base power moves...that's not always effective enough for me 3:
Froslass though has a quality different from all of these Pokemon, it can easily set up at least one layer of Spike per game 99% of the time making sweeps and attacks with all these aforementioned Pokemon significantly more potent. Spikes is second only to SR in usefulness but everyone already has a SR user, so when you look at Spikes you always have it paired up with SR already. At this point all of these Pokemon - Crobat, Kingdra, Daramnitan, Flygon, Heracross become so much more dangerous. Froslass single handedly can destroy some opponent's tactics (try pivoting with hazards up lol) while creating win conditions for you. Who cares if your opponent has a Suicune, Darm will sweep right past it after a couple of hazard switch ins! Since Froslass is the fastest and therefore most reliable Spiker I think its one of the very best Pokemon in UU (not to mention Ice Beam checks loads of stuff and Dbond can get a kill in most games).