Here is a good visual for the Grobbulus fight
Naxxramus Military Quarter - Instructor Razuvious:
This strategy was
successful. Need 2 priests, we used shadow priests; both assured me
that hit rating was necessary to make mind control work. They had 200+
hit each.
Each priest chose 2 of the understudies - the two on
the left for one, the 2 on the right for the other(not the front 2 and
back 2). 1 tank assigned to each pair. Third tank is loose, catches
strays....should not have to tho. Warrior tanks for targeted taunt used
here.
Start:
1. Tanks charge in and pick up the understudies.
2. Priests advance and mind control - you have 3 to 5 seconds to do so.
3. First priest uses bone armor (IMPORTANT!) THEN taunts the Boss.
4.
After about 9 seconds, or near the end of Bone Armor(shield wall), the
second priest does Bone Armor and taunts (5 yard range on taunt, so
have to be close)
5. First priest releases his understudy
6. Tank: pick up the understudy just released
7.
Priest: MC the other understudy from the tank, move to Rezuvius and
(bone armor then) taunt when bone armor is about to go down - never
tank without bone armor.
8 Other priest releases understudy, other tank picks it up, other priest gets ready to bone armor -> taunt.
9 Rinse and repeat till loot. (Kill understudies after boss goes down.)
Fine Tuning to avoid the wipe:
*
Tank the loose understudies in a clear area near the boss so they are
easy to find and MC; Mark them all. the priests need to be able to talk
to each other.
If the tank(s) are close, they can autoattack the
understudy they are holding, and click on the other one thats MC'd,
till its loose, then taunt to keep it off the priest. The priest then
picks up the one on standby, very smooth.
* Fight the boss down in or near the green circle, just because it works very well.
*
Be careful using pally tank - can pull the boss with AOE pull, and
doesn't have charge ability. Might be able to work around this though.
* Let the understudy get aggro before DPS. After the understudy has aggro, you can go all out.
MythBuster:
You CAN stand on the ramp to DPS, it does not cause a problem. You do
not HAVE to use shadow priests, just priests with good hit rating so
they can MC.