Originally Posted by PapapaintHello, and welcome to Tankspot's Cataclysm Raid Guide. My name is Papapaint, and in this video I will be discussing the strategy for Chimaeron in the Blackwing Descent Raid Instance.
Chimaeron is an extremely healer-intense fight, and requires a great deal of self control on the part of your healing team--you won't be seeing very many satisfyingly full green bars.
It is important to note that you should not begin the fight by simply hitting Chimaeron in the face. Instead, go around him and speak with Finkle Einhorn, locked in a cage next to his trusty Bile-O-Tron. After speaking with him, the Bile-O-Tron comes online, stinks up the room, and wakes up the napping triple-headed monster. As long as the Bile-O-Tron is active, your raid gains Finkle's Mixture, which prevents any members of your raid dying as long as their health is over 10,000. If a raider's health is over 10,000 and they WOULD die, they're instead knocked down to 1 HP.
In simpler terms, this means that during Phase 1, your raiders' health only needs to be over 10,000 HP---healing them past that is essentially overhealing. This is due to Chimaeron's Caustic Slime. This move will target four players, splitting 320,000 damage (two players and 280,000 in 10-man) between those players and all other players within 6 yards of them. In addition, it will apply a debuff to all affected players, reducing their hit for 3 seconds. The easiest way to deal with this is to split up, staying 6 yards apart--any player hit by the green vomit will simply be knocked down to 1 HP. Heal them to over 10k HP, and they're safe once again.
The exception to the 10,000 HP rule is, of course, the tanks. Chimaeron hits hard, and has two extra-nasty abilities to look out for: Break and Double Attack. Double Attack is exactly what it sounds like--on Chimaeron's next melee, he will melee twice in very quick succession. This means that even if your tank is over 10k, they will be hit, reducing them to 1 HP, and then hit immediately afterwards, killing them. There are a few ways to deal with this. Defensive cooldowns work well, but topping off the tank will generally allow them to survive the double hit. Break is designed to make topping off the tank more difficult--it increases the damage taken by the tank by 25% and reducing ihealing taken by 15% for every stack. This is applied every 15-20 seconds, so you'll want to have your tanks trade off every 3 stacks, with your tank popping cooldowns to survive through the 2nd stack.
The last ability of note during phase 1 is Massacre. Massacre instantly deals 900,000 damage to every player and can not be mitigated in any way. This means that every single player in your raid over 10,000 HP will be reduced to 1 HP, and all raiders below 10,000 HP will die instantly. This includes the tank, so make sure you have at least one--preferably more--healers dedicated to healing up the tank as quickly as possible while the rest of your healers rush to get everyone in the raid back over 10,000 HP.
Occasionally after Massacre, the Bile-O-Tron will be knocked offline, removing the buff from your raid and taking you into phase 2. During phase 2, Chimaeron's heads will begin fighting one another, and he will cast fued for 30 seconds. You have 15 seconds to stack up and heal the entire raid before he begins vomiting poison bombs. Without the buff to protect your raid members, it's necessary to clump up in order to split the damage amongst your whole raid. After 15 seconds, he will vomit every 5 seconds, then finish off with another massacre. Use defensive cooldowns, self heals, and help top off all raid members in any way possible. While he casts Massacre, your raid should be spreading out to resume Phase One.
At 20%, Chimaeron will take your raid into Phase 3. During phase 3, your whole raid will be afflicted with a new debuff: Mortality. This reduces ALL healing effects on your raid by 99%... so there's basically no reason to continue healing. In addition, Chimaeron will become untauntable and take an additional 10% damage. To simplify the strategy of phase 3... BURN HIM DOWN. Pop Heroism or Bloodlust, have your healers help out with DPSing, and start kiting him. Watch his aggro table to determine who he's going to attack next, and have that person run across the room. Use Iceblocks, Bubbles, Fades, Feign Deaths, Guardian Spirit, and any other tricks you can think of to keep him running as much as possible. The more he's moving instead of attacking, the more DPS time you get. This is purely a race against his ability to nom nom your entire raid, one at a time. With proper cooldown usage, some hard DPS, and clever use of aggro mechanics, Chimaeron should be an exhilarating kill.
Thanks for watching this guide. I will include the second half of this fight with some minor commentary to give you a better idea of how we handled all three phases. If you enjoyed this guide and would like to stay up-to-date on Cataclysm raid strategy information, subscribe to this video channel. As usual, comments are welcome in both the youtube comment box and on the official thread on Tankspot.