The Temple Of Kor'shaa
There are several strategies for this fight, but one involves keeping Zarda half way in the hallway that leads to his/her room. Kodux is pulled into the main room with the four fountains and kept their. If Kodux teleports someone they appear in the main room and it isn't too much of a problem. However if Zarda teleports someone she will run to that person in the main room. The best way to deal with this is having snap aggro abilities and having the person that Zarda is targeting running to the main tank. During the fight the MT or a caller will shout out who Zarda is targeting then having that person run towards the MT group. This can get tricky because the teleporting effect will dissorient the target of the teleport so memorizing the zone will help out.
When Zarda and Kodux hit 30% you will have each group stay on their respective target. You maybe tempted to have the whole raid switch to a specific creature, but this can be too risky and cause a rather nasty wipe. Once Zarda or Kodux goes down have the raid quickly switch to the remaining creature to finish them off and finish the fight. This fight will take some practice if you are not used to it, but can be done with a well coordinated raid effort.
Moving on your final target will be Selrach Di'zok The Overking. This fight is the most difficult in the zone because of the chances for a wipe to happen. However if you managed to defeat Zarda and Kodux you will have a great shot at it. The Overking has 4-5 minions at the start of the battle and during the entire fight will spawn 3-5 additional adds with varying effects. One of the minions has a nasty AoE stun effect that can last 3-4 seconds disrupting major attacks.
One strategy for dealing with The Overking is to pull him to the 2nd pillar on the left or the right into the tiny little notch. This will keep him far enough away from his minions and allow you to deal with him in peace. During the fight The Overking will case an AoE ability that will stun the main group so having the healers stand just a few inches out of healing range when this goes off will help out. Unfortunately The Overking hits very hard and you will need to be constantly healing the tank as well as keeping The Overking debuffed as much as possible.
Your Off tank will have a difficult time as well because he/she will need to grab all of the adds that spawn and keep them off of the main tank. The adds arn't difficult and go down quickly to massive AoE fire, but can prove difficult if they arn't dealt with in a timely manner. When The Overking reaches 56-57% you will need to have a person with the wand from The Executioner's Throne Room ready to spam it. This will cause the weapon that The Overking is about to use to dissintegrate and allow you to proceed in killing him. However after his weapon is destroyed little fire blobs will start comming down from the ceiling. If the blobs reach The Overking he will power up and wipe out the entire raid force in one shot. Anyone that survives the AoE will be instantly shotted as The Overking runs around killing them.
Having 1-2 people quickly spotting and killing the blobs helps out during the fight. Have your group keep killing the adds that spawn and the blobs then have the dps attacking The Overking. He should go down smoothly if you can keep this process up. As a bit of warning for every person that dies The Overking will heal himself for 2% like The Protector in The Protector's Realm. Keeping deaths to a minimum maybe difficult, but again if you have a well coordinated raid force he will go down.
Selrach Di'zok is needed for some epic updates including the Shadowknight and Warden epics. One final warning is like the protector's realm YOU MUST use the epic updates like for the warden in the zone unless specified otherwise. The items are no-trade and no-zone so when you zone out you will loose them.