melee 5x teams are not really viable, i would maybe level one of each up for utility/versatility, but you arent going to be soloing much content or owning many people in the BGs with 5x melee as you will with 5x ranged.

you can do it, its just not really useful. it would be alot like maxing fishing on 5 toons.. your better off running heroics with 5x shaman and buying the fish you need.