We went for B>R>B>R>G>B>R. Kiting the blue is easy if your team is passable at mechanics, and you can clear any problematic ice patches by dispelling the fire over them.
We went B>R>B>R>B>R>B ignoring green completely. That negates all the raid damage during normal phases as long as people know how to move and only has healers dealing with tank damage and cinders, which just requires some proper cooldown management on the tank tanking green. We were even going with two mistweavers, which count as melee, and one ranged DPS, which meant our third healer (holy paladin) was running something like 70% of the time on the last two heads.