With a 5k GS, you should roftstomp that place. I've can farm that on either my DK/Rets or 5xshammys. I don't use any special positioning or anything, but I do keep either frost resist aura up or totem of frost resist depending on which team.

Start off with heavy aoe to kill the adds - they should drop in the first few seconds of the fight and don't have a ton of HP. On DK/Rets, D&D + 4 x consecration+ frost/plague pestilence. On shammys, magma + nova burns them quickly.

Next time I'm in there, I'll try and remember to fraps it.


After adds are down, then DPS the boss as normal, until you see him tossing the boulder. As soon as you see him cast it, strafe away. You have plenty of time if you start moving within 2-3 seconds of the toss. The knockback and damage adds up quickly, so make sure to strafe. Once he runs back to his forge, you need to run behind one of the tossed boulders and make sure it's between you and you're group. If you do this, you'll lose the stacking frost debuff and should have time to heal up and top your guys off.

I'll reiterrate this: the two keys to this fight are 1) strafe away from the boulders so you don't get knocked back and take boulder damage, and 2) erase the stacking frost debuffs.

My shammys have a much easier time on this, cause I can pop 5 rock elementals to tank most of the damage, and they are immune to frost damage. Now if I could figure out how to kill tyrannus on heroic with my shammys.