Hi this is my first post.

What I do in Gundrak (not doing heroic yet but the same goes) last boss is park my 4 shamans in one of the little corners to the left and right just before the boss. With their backs to the wall they won't be thrown around and I can just concentrate on playing the tank and spamming macros for shamans. I use 1 mana spring, 3 healing stream, 4 ToW, Str of Earth, Stoneskin, Wrath of Air, Windfury (which is my default farm).

I've only done Novos once (on normal also) and it was pretty hard. The way I finally got him down was keep shamans on follow after the summons stop coming and when he casts Blizzard I just move the guys to his back and maybe a little extra so they won't be hit by the Blizzard. I had to use Fire Elementals because of how much I needed to move. I'm probably not going to use this tactic on him again and it might not be viable at all on heroic, but just something to think about. I have a pally tank so I used Frost Resist Aura to free up fire totem for elementals/ToW.