WTF I just did 1800 with BLOOD, I cant see why its not viable. It has a high burst like FROST but lacks hungering cold. Heals AF tho. Good comp with prot war... here: check it yourself, play what you like, not what they tell you to :-)
http://armory.warmane.com/character/...ckrock/summary
dude its okay, you dont need in arenas Unholy Blight, mostly useless talent compared to DRW (you gotta kill cleansing totems quickly tho). Its more of a necessity in duels, but in 2v2 with high burst damage - the moment they start to dispel, they are wasting global cooldowns not for healing themselfs therefore they die instatnly since u crit for 7-8k and prot warr with shockwave for 12k and revenge for 18k.... they cant dispel and heal themselfs at the same time :-)
Anyone that dislikes blood dislikes fire or arcane mages. It is viable, you just gotta have balls to play it (instead of playing whats meta. Its all about skill and macros.)