Maybe you’ve already killed Festergut, or maybe you’ve decided to try Rotface first. This fight is all about awareness and coordination, so if you’re ready, let’s get to it!
There’s a lot of things that happen in this fight, so I’m going to try to explain everything in the order in which it generally happens:
The Pull We’ve found the best positioning to be three groups forming a semi-circle around the boss. The tank runs in and grabs aggro, swinging Rotface around. Melee and healers stand directly behind the boss, while the ranged are split into two groups, one of them 90 degrees to the left of the boss, and one of them 90 degrees to the right. One sucker–I mean, offtank–stands at the edge of the room. You’ll see why this poor guy is pretty darn important soon enough.
Slime Spray We have found that Rotface doesn’t target a player for this, but he does turn in the direction of a group of players, which is why we’ve split into three groups. He will choose one of the groups, turn, and cast Slime Spray. Once he turns, he won’t move, so if the boss is facing your group, you need to run to the side or behind him. He will do Slime Spray in a cone in front of him which does just enough damage to kill a person if they stand there without a heal (or even with, depending on the cirumstances). Don’t stand there, kk? This will continue, happening every few seconds, throughout the entire fight.
Mutated Infection Sometime right around the first Slime Spray, someone will get Mutated Infection. This is a disease that hurts A LOT. Please, healers, for the love of all things holy (or resto, or discipline), heal the person with Mutated Infection. The person with Mutated Infection must immediately run to the poor offtank on the outside of the room (really, this is the suckiest job ever). They must be cleansed (you need ONE PERSON assigned to do the cleansing, at least until 20%. You may find you need a second cleanser at that point). When they are cleansed, a small ooze will spawn at their feet (if a person dies with Mutated Infection, they will spawn TWO oozes. So don’t die!). It cannot be taunted, but it can be CC’d to some extent, if necessary. This will happen continuously and with increasing frequency throughout the fight.
The first person to get this ooze is going to have to stay with the offtank, as the offtank will be unable to taunt him. The second person to get the Mutated Infection will run to the offtank and the first ooze. At this point, the two oozes will merge, and the affected players can go about their business. The offtank will taunt the big ooze and kite it around the room as it does a ton of AoE damage.
For the rest of the fight, everyone who gets Mutated Infection will need to run IN FRONT of the big ooze, get cleansed, make sure their small ooze has merged with the big ooze, and then return to their original position.
The Poison Slime Pipes Your offtank will be kiting the add around the room and simultaneously dealing with big puddles of slime on the outside edge of the room. Professor Putricide will announce that the poison is coming. At that point, one of the spouts positioned around the outside of the room will begin to sputter slime. A few seconds later, a huge slime pool will fill the edge of the room on that side. While the offtank can probably run through this pretty safely as long as he’s got healers, keep in mind that the slime hurts and slows you, so those with Mutated Infection should NOT run into the slime. Wait for the offtank and meet him on the other side.
Unstable Ooze Explosion When 5 small oozes have merged into the big ooze, it will stop where it is and begin casting Unstable Ooze Explosion. When it explodes, it will send slime flying through the air, landing where randomly-chosen players were standing when it was casting. As soon as it starts to cast, our entire raid clumps in the middle of the room, on the boss. When it finishes its cast and starts to spray, everyone runs for the outside edge of the room. This way, the explosion lands in the middle of the room, where (hopefully) no one is standing. Once the big ooze has finished exploding, you start again merging the oozes.
The Soft Enrage Rotface doesn’t have an enrage timer; however, like Saurfang’s marks, eventually so many people will be getting Mutated Infection that there will be slimes everywhere and your raid will be overrun.
That’s it, that’s the entire fight. It sounds pretty easy, but there are so many ways to wipe the raid, you’ll probably work on this one for at least a little while.