Some will leave this wing for last. Personally I prefer to give that honor to the Construct wing...since Thaddius is a true pain (you'll read about this tomorrow).
Instructor Razuvious
There's no easy way to discuss how this fight is done as it all depends on your tank/priest situation. But wait? This is a Warlock blog! So really for this article we will focus on a few tips to make sure you can maximize your DPS without pulling aggro from whomever or whatever is tanking :)
Its time once again for our favorite winged powerhouse - the Doomguard! Only suggestion for him on this battle is to turn off the autocast on his rain of fire. He will do crazy AoE and may kill the understudies otherwise.
So as he's doing his dirty work, what are YOU doing? Focusing 100% on Razuvious. Just make sure to give the tank about 5 seconds to get a good aggro lead before you engage, and that you are at max range to avoid all of his AoE abilities.
Once he's dead, you'll focus on downing the understudies (if any are left). Again...easy.
Gothik the Harvester
This fight sucks for warlocks. Plain and simple. Every class has at least one boss they are pretty much useless against, and this one is ours. We aren't COMPLETELY useless, but for phase 1, we're not ideal.
After its decided by the raid what side you will be on, you will pop a demonic circle on the OPPOSITE side of the one you're going to be at. Why? Two reasons...
One - In case the other side is getting overwhelmed with mobs and needs some more DPS (as little as you can do in this phase)
Two - Once the gate opens, you'll get a few yard head start on everyone else...if he's not on your side.
No matter what side you're on, you will want to keep yourself (and actually everyone) positioned with your back to the gate for max DPS and less "run distance". Seed of corruption every trash mob that comes out, over time more and more will arrive. Seriously, for the first minute or two you will be doing almost no damage as, in theory, the other DPSers in your raid will have killed the other mobs before you even hit them.
Phase 2 is thankfully more intensive for us. A pure DPS race (he plants a stacking debuff that with each application will make you weaker and weaker), and we'll be unleashing everything we have. Use the time when he teleports away from your side to life tap in order to maintain the least amount of stress on your healers. He should be dead before the 3rd (or even 2nd depending on your DPSers) teleport. Again..easy :)
The Four Horsemen
Oooook. I don't normally do this but I'm going to do two separate strategies for this one. Why? Because in 10 man you're going to be a tank, the ONLY tank, for the back 2 horsemen.
Wait? WHAT!? How!?
Summon your Voidwalker. Notice how much HP he has? He's a monster truck in demon form. The 2 mobs in the back do not hit hard at all. A single healer and some fancy demon work in the back will free up more DPSers for the front 2 horses, and in theory make this fight go by a lot faster.
At the start of the fight you, your voidwalker (making sure he has gotten the same buffs as the rest of the raid has gotten), and a healer should be already in position on that green circle in the back. Once the main tank starts the fight, send your demon off to tank Sir Zeliek while you go to town on Lady Blaumeux (and while on this side you will be keeping Shadow Ward up WHENEVER its available). Watch your debuffs and stay out of voidzones...once it reaches 3 stacks, you will have your demon attack whatever mob you are on, and you will go to whatever one he was on (don't worry, the horsemen don't move). Back and forth over and over until the fights done. After the fight is dead, it is your duty, your OBLIGATION..as a warlock...to let out a /roar so that the entire raid knows that yes..you are in cloth...but you just tanked 2 Naxx bosses at once. Its true...its required..I looked it up.
Well that's all hunky dory for 10 man, but we're heroic! 10 man? No way!
*cough* ANYWAY! For 25 man things are going to go way different. We're not going to waste our DPS by tanking (there should be MANY other able classes available to take up that job), no no...we're going to do what we do best. DPS!
So my raids strategy is extremely easy, and also pretty damn effective, but keep in mind this method only works if you have the DPSers to do it fast enough (a shaman comes in handy here for heroism). The ENTIRE raid minus the tanks/healer in the back, and one healer and tank on the other side of you will be stacked up as close as possible in the front left of the room. I mean it, act like that warrior doesn't have a body odor issue, or that rogue smells like sweaty leather and get all buddy buddy with em. The reason for this is simple...Thane (the horsemen you will be killing first) has a nasty Meteor he likes to summon. The closer you all are to one another, the less damage it does.
Back up for a second. You still didn't explain what we're doing!
I'm getting there. Its basically a "Do as much damage as fast as possible so that the tank can't get more than 3 stacks of that debuff" situation. Everyone will burn into Thane as much and as fast as possible (heroism if you got it!), once he's dead, you'll just hustle to the other side, and do the same with Baron Riverdare. Send the offtank to go make a sandwich (no..not really..have him go to the back to assist on whomever is doing their work back there), and just burn this mob down. Once he's dead, you will run to the back and do the same thing with the remaining 2 horsemen...keeping an eye on your own debuff the entire time. Once it reaches 3 stacks, you (and your demon) will switch targets. The entire encounter shouldn't take more than 5 minutes.
So a few extra tips for this one:
Shadow Ward needs to be up at all times.
After the first 2 horsemen are dropped and you're running to the back, suggest your raid split up so that they are all not focused on one mob at a time. This is less of a strain on the healers. Just make sure they (and you) are watching their debuffs.
A Doomguard is great for this fight too, if he's available that is. He has a 30 minute cooldown so he may not be ready yet after Instructor Raz. If he's not, no biggie...he's not NEEDED, just fun to use :)