If on marrowgar, one of your tanks die - Tell tanks to hit cooldowns and use your Eyes of the Beast - Spell - World of Warcraft then go in front of the boss and tank with the other tanks.
You MUST be specced into 90% reduced AoE damage ability in your pets talent tree for this to work.
Saber lash damage will be reduced by 90% and you don't have to keep aggro.
Have a nice day everyone.