Basic setup – see link above.
Square is where (liyhe) as Shadow was assigned.
Between me and the Orange healer our lock had placed their portal.
Circle and X is where our 2 healers stood
Triangle is where our hunters stood.
Moon is our Mage.
Boss is where you would normally place them. and our 2 melee DPS were in melee. XD
What we did is for the 1st crystal, I took the 1st one entirely. I found I was able to stay alive thanks to our healers with calling for AM around 14-15 stacks and eating a cookie and bubble as needed. I popped Dispersion around 19 stacks to ride it out. Then I went back to my square position to wait out the tormented debuff.
Our order for crystals was Me, DK, Mage, Enhancement Shaman, Warlock, Hunter x1. The 2nd hunter was fit in as needed. We found that sticking to our order and using the 2nd hunter as a floater helped out to ease confusion.
After I took the 1st crystal, the DPS went with a 3 person per crystal rotation. With the next person being ready to take the crystal when the other person went. It is important to be close by to take it but not close enough to get the tormented debuff in error. Also we found it is best to always exit in one direction. We chose to leave from the left.
Healers after the 1st crystal were at 90-100+ stacks of the healing buff if i recall. If they cant build that fast, tank was more then likely not going to survive.
Also with the Countdown debuff – if it was a healer picked we made the people move to the healer to allow them to heal still. if it was 2 others, we had them meet in the middle.
Countdown may mess with your rotation on a little, but keep a level head and should be ok. reminder – Tormented is refreshed for both players if spread.
If a healer did get the debuff they needed to communicate to their healer so they could swap if they were on tank duty.
The tank on the 1st crystal will need to stay alive for that crystal solo – so cooldowns and healthstone, pots as needed.
Other then that, the fight is similar to normal. ranged need to get to their spots as best they can to lower the chance of spreading tormented. Heals need to comminicate and we found it best to have one person only to call out the order and the floater as needed. DPS check is quite high, we carely killed him – 2 seconds past enrage, but I know my case I flubbed my rotation – not a shadow priest at heart lol.
That is all from what I recall - not a lot of changes – just need to be more careful to detail and where you move.