Thank you very much for the list.
your tips is pretty much exactly what we were planning to do i just needed the groups for shaman spawn so to try and plan the 3 tank order so our DK tank was off the boss for the shaman spawns and ready to grip, he is our off spec tank so i like to have his exact job clear before we start fights so he can write it down and be ready.
We tried this boss for just a few pulls last week and were sometimes losing people to the sniper add, bad spot healing i suppose, so i was thinking of putting our 2 rogues on him all the time with paralytic poison to lock him down and mostly remove that damage completely.
Thanks again for all your help