Originally Posted by
PinDrop
So, just completed this after attempting it literally all night.
Both the tauren and worm have an enrage mechanic(+150% DMG) when one dies, if you kill the tauren you will most likely die to the worm's periodic aoe unless you have healing/sustain legendaries, so you need to kill it first or at the same time as the tauren. Problem is the armor stacks, which prolong the fight. DPS the tauren while avoiding green crosses and interrupting his casts, I used freezing trap and counter shot to do this, and had intimidation as a backup in case things went bad, both set up to cast on my focus. Try to get the timing/rhythm of these casts down, he will cast it once, then do his earthquake when the worm dissapears, then casts it again while you are dealing with that, and repeat when the worm comes back up. It will one shot your pet/you, it must be interrupted, or turtled if its on you, it wrecked my pet even in tenacity, but you want him in ferocity for the dps, and nothing else hurts him that a mend pet can't fix.
The earthquake drops three stalactites down, don't let them hit you (you can stand on them after they have fallen). Worm will circle the area as a visible dust cloud, then pop out and wiggle around. After he does this, he will head straight for/through where you are standing, position yourself so he runs into a stalactite, optimally 2 (green cross loves to come up right as this happens just to mess with your positioning). The worm can hurt you doing this, so you need to move out of the way right as he starts moving towards you. He will do this charge 2 times iirc, so try to get a 2 stalactite hit in if you can to hasten his loss of armor.
There will be an increasing number of eggs that spawn during earthquake as well, if left alone they will hatch a small worm with the same % of health the egg had that will spew avoidable poison blobs at your position. cleave them down. Tauren will also summon a totem with little health that will stun you, must be killed, has 1 hp, and a visible tiny green circle on the ground before it spawns.
So while you whittle down the tauren, eventually the worm will have his armor gone (tauren for me was about half-ish health, similar number healthwise to the worms), so now you want to start focusing/cleaving the worm whenever it is up, in order to kill it before the tauren. Go back to hitting the tauren when worm burrows, but make sure you end up killing the worm first, the tauren doesn't really do any direct damage other than his cast so the damage buff to him is negligible.
I recommend setting tauren as your focus, maybe making a very visible weakaura showing his cast in case you are targeting a worm or egg, etc. one thing to note here is that pet taunts do not work, though your pet should hold aggro due to doing more dps than you, however, feign death will NOT drop your aggro, so if your pet does die, you can rez him mid fight, but depending on the length of the fight it may take awhile before he eventually pulls the tauren back off of you. This is bad, and hard to survive (wtb mend self), so do not let him get any of those casts off, ever.
Good luck, it's a great challenge.