Ok so I downed this guy using my Prot pally team, 3 ele shammies and a moonkin. I did not have a dedicated healer, nor did I spread the team out.

What I did do is put them in the Frost Resist gear I used for Garfrost. Now I don't know if that was the winning factor, or if I was lucky, but I did manage to down him.

I would keyboard turn them as needed to dps the boss as I kited him over ice.

I'll see how repeatable this is in that config this week, I am just throwing out what I did in case it helps others.