Originally Posted by AlienaHello and welcome to the Firelands raid guide! My name is Aliena and in this video I'll show you all you have to know about Beth'tilac, one of the first encounters you come across in this new raid instance. This guide is up to date as of patch 4.2, but some details may become incorrect or even irrelevant in the future.
Beth'tilac is a two-phase encounter - for the first phase, you'll have to split up your raid into two teams and deal with a lot of adds, while the second phase is a stationary burn in which you have to kill Beth'tilac before raid damage becomes overwhelming. We defeated this fight with 2 tanks, 7 healers and 16DPS, but similar raid configurations may work just as well. Less healers, for instance.
For phase 1, you'll need a team consisting of 1 tank, 2 healers and about 3-7 DPS that's assigned to deal with Beth'tilac herself, who upon the start of the fight will retreat to an upper platform. The rest of your raid stays downstairs and takes care of the various adds that Beth'tilac will summon. The amount of DPS that can join your upstairs team to fight Beth'tilac herself is dependent on how many DPS you need downstairs to deal with the adds in a timely manner.
Preferably, you'll want your AoE DPS downstairs, while single target DPS is better suited for upstairs.
As soon as you engage Beth'tilac, she'll retreat upstairs and barrage the raid with AoE damage until people join her on her web. Shortly after, a lot of Cinderweb Spinners will appear. If taunted, they'll drop to the ground. They don't deal a whole lot of damage and target random players. When you defeat them, the strand of spidersilk they descended on will turn into a vehicle that your raid members can click to reach the top of the web and fight Beth'tilac.
Make sure that your tank is the first person to climb up and that at least one healer follows right after. This should be communicated on vent, and DPS should wait until both tank and healer secured a line.
Once on Beth'tilac's web, there's some AoE damage that goes out, but your downstairs team will not have to deal with any more AoE damage until Beth'tilac is by herself again. Tanking her is easy, and the only thing your upstairs team has to look out for are meteors that come down on random raid members and will deal significant damage. Fire remains on the ground where they landed, so don't stand in it.
Beth'tilac will continuously lose energy, and once her bar hits zero she'll start channeling an 8-second spell called Smoldering Devastation. Anyone remaining upstairs when the cast goes off will die - yes, even through bubble, so don't even try. While she's casting this, every person upstairs needs to jump back down through the hole in the middle of the web and join the downstairs team.
Once she finishes her Devastation cast, Beth'tilac will go back to dealing AoE damage to everyone downstairs and sending more Spinners into your raid, so repeat the same thing you did last time: Kill the spinners and take the vehicles back up. She'll cast Smoldering Devastation three times before permanently joining your raid downstairs, so you'll have to repeat this pattern until then.
While your upstairs team is busy repeating this cycle, your downstairs team has to deal with two more types of adds - Cinderweb Drones and Cinderweb Spiderlings. The Spiderlings will move towards the Drones and should they come close, the Drones will eat them and gain an attack buff as well as health back, so your goal is to kill the Spiderlings before they reach the Drones.
The Spiderlings will always come from the Northwest, Northeast and Southeast corners, which leaves the Southwest open for your downstairs tank to drag the Drones to and tank them. Your AoE DPS should be split up into 3 groups to take care of the approaching Spiderlings from each direction. If you have hunters available, or other classes capable of AoE slows, you should utilize them to maximize the time you have before the Spiderlings reach the Drones.
We assigned 3 DPS to each corner, but you might need more or less depending on the DPS your raid is capable of. All other DPS remaining downstairs should focus on killing the Drones. If a Drone does not die by the time his energy is depleted, he'll join Beth'tilac upstairs and siphon her energy, giving you less time to DPS her.
There'll be a constant stream of adds throughout phase 1 even while your upstairs team temporarily re-joins you, so always make sure to kill all adds in a timely manner. Until new Spinners appear, your upstairs team should help out with any remaining adds.
Finding a balance of DPS for all the adds as well as the upstairs team is half the battle of the first phase. By the time Beth'tilac completes her third Devastation, she was at about 80% health for us and we still managed to kill her, but getting her lower in phase 1 would certainly make phase 2 easier.
Once Beth'tilac descends after her third Devastation, no more adds will spawn. If you have any adds remaining though, take them out as quickly as possible. Beth'tilac will cast Frenzy on herself periodically until she dies, and with each stack of Frenzy she gains, she'll do 5% more damage which applies to her normal hits as well as her pulsing AoE damage.
This sets a soft enrage timer - the shorter this phase is, the better. Other than that, this is a tank-and-spank phase. The tank that picks her up at the start of the phase should drag her to the middle of the room and the rest of the raid should stack up at her tail end. No one should remain within 10 yards of her current tank, as he'll stack up a debuff called The Widow's Kiss which makes him deal damage to others within 10 yards.
The Widow's Kiss also stacks up a healing debuff, and after a while, he'll barely be able to be healed at all. At this time, your offtank should taunt Beth'tilac while your main tank runs out of the raid to reset his debuff.
If needed, make good use of Bloodlust, Heroism or Time Warp during this phase, and set up a chain of raid cooldowns such as Power Word: Barrier, Rallying Cry, Divine Guardian or Tranquility as her Frenzy stacks get higher. Tanks might also want to utilize self-cooldowns towards the end of the fight.
That's all the tips I have for Beth'tilac. As always, good luck and have fun! I've attached footage of the whole encounter in case you want to see how we dealt with the various mechanics in detail.