I think a fair few guilds are approaching Brutallus now, so I thought I'd post this guide I made for the other tanks in our guild who haven't tried him yet:
We use VT to arrange tank swaps - the tank with aggro says "3" when he has 3 Meteor Slashes, the taunting tank then says "Taunting". This arrangement allows the MT healers to arrange changing targets easily. Obviously amend this as required for your guild.
Brutallus
Ok, Brutallus is just about the most challenging fight in Sunwell so far for a Druid - you need to dps, tank and watch timer bars so that you use skills and potions at the correct time. Good luck
Preparation
First of, you need large quantities of the following:
[Ironshield Potion] - 3 for every attempt
[Scroll of Protection V] - 1 for every attempt
[Adamantite Weightstone] - to improve threat
Any 30stamina food
Flasks or Elixirs, depending on how you set up your gear.
On top of this, you need a good quantity of the following to be "fully" buffed
[Scroll of Agility V] - 1 for every attempt if possible
[Scroll of Strength V] - 1 for every attempt if possible
Finally, you will need a macro:
/use Ironshield Potion
/cast Barkskin
This macro will use a potion (taking you out of Catform in the process) and cast Barkskin all in one keypress and using a single global cooldown. You can then go Bearform and should have around 10secs left on Barkskin to tank with.
Gear
Gear wise, you need your best gear, gemmed fully to epic standards and fully enchanted. This is a tough one.
You should aim for maximum Armor - for the pruposes of this fight there is no armor cap - just stack as much armor as possible. After this you need as much stamina as possible - you should be around 23-24k HP fully buffed or higher for this fight. Once you have armor and stamina sorted, then try and get as much dodge and hit/expertise as you can.
My gear recommendations here are for someone just starting to tank Brutallus, once you have full T6 you have a little more room to improve threat and dodge without affecting too much your survivability on the fight.
Recommendations:
All your T6
Blade's Edge Mountains trinket:
[Badge of Tenacity]
[Commendation of Kael'thas]
[Idol of Terror]
[Wildfury Greatstaff] or
[Pillar of Ferocity]
If you don't have the Sunwell T6, the following are good alternatives:
[Treads of the Den Mother]
[Pattern: Belt of Natural Power]
S3 Bracers or badge reward bracers
Remember you need -2.6% chance to be crit from gear. You can use a mix of resilience and defence to get this, defence is marginally better due to the dodge you gain from it, but resilience may allow you to balance this out using better gear elsewhere.
The Fight
First thing to mention here -
WATCH THE TIMER BARS. Seriously, the boss timer bars from BigWigs are the most important thing to look at in this fight, along with how many stacks of Meteor Slash you have while tanking.
The Pull
The Boss will be misdirected onto the 1st tank. Cast Faerie Fire while he is running in, then commence dps on the boss. Mind your aggro at the start and use Drums if you have them - it's best to arrange with any other Drum users in your group that you will always use your Drums first and let them use theirs after yours every time. This will allow you to just use Drums throughout the fight when the cooldown is available without needing to watch if they are already up on your group.
DPS/Tanking Rotations
Ok, so the boss is tanked and you are dps-ing. You need to WATCH THE TIMER BARS! What you need to do is be ready to tank as soon as the tank receives his 3rd Meteor Slash. On the first round you need to closely WATCH THE TIMER BARS so that you know when this is going to arrive. The basic rule
at the start of the fight only is that the 3rd Meteor Slash will arrive fairly soon after the first Stomp as follows:
Meteor Slash #1 (keep dps-ing)
Meteor Slash #2 (keep dps-ing)
Stomp (look at timer bars and get ready to go Bearform and tank)
Meteor Slash #3 (you need to be in Bearform, with an Ironshiled Potion and Barkskin running ready to taunt as soon as you hear the other tank say "3" on VT.
The way this works in practice, and for all occasions where you need to tank is as follows:
At around 9 seconds before the 3rd Meteor Slash you need to prepare to tank.
If you don't have an Ironshield Potion running then use your macro to take one, else just use Barkskin.
Go Bearform
Wait to hear "3" on VT
As soon as you hear "3", say "Taunting" on Vt and Taunt the boss.
Now you need to build a LOT of threat - the whole aid is nuking like mad.
My rotation here is: Taunt > Mangle > Maul > Lacerate. After this you need to use a max threat rotation. Rage isn't an issue here so basically you need to keep Maul up at all times (so that you Maul instead of autoattacking on every swing), Mangle every time the cooldown is up. Lacerate until you have 5 stacks, Swipe if Lacerate is at 5 stacks. Repeat this rotation but don't forget that you also need to cast Faerie Fire every 25seconds (if it resists keep casting it until it sticks).
Ok, while you are doing all this, make sure you cast Drums if the cooldown is available.
By the way, I hope you are still
WATCHING THE TIMER BARS? When Stomp hits you need to either use your Trinket is it's available, or use Frenzied Regeneration if it isn't.
Also
look at your stack of Meteor Slash debuffs Once you get 2 debuffs you need to be watching for the 3rd Meteor Slash. As soon as it hits you, say "3" on VT and wait for the other tank to taunt the boss off you.
Once the boss is taunted successfully, go Catform again and resume DPS.
You repeat the tanking and dps cycle until the end of the fight. Timing of your turn to tank becomes a little easier now because you can look at your Slash debuffs, when your stack gets down to 10secs then you know that the 3rd Meteor Slash is due on the other tank and you need to get ready.
However, that's not all.... you didn't think it was going to be did you? Read on...
Stomp Avoidance
Ok, you should have the normal tank/dps cycles worked out by now, but there's one more trick you need to use during the fight. Stomp Avoidance.
The Meteor Slash and Stomp timers are on different cooldowns. Therefore in the middle phase of the fight, they sync very closely. What we need to do in this part of the fight is to try and work it so that the tank being hit "misses" the Stomp by waiting until the other tank has Stomp before immediately taunting. This saves the healers a lot of trouble in that phase of the fight and also allows the Warrior Tank to spread out his trinket usage and the use of his timed abilities (Last Stand etc) to give himself the best chance of survival.
The key to successfully avoding Stomps is to (yes, you guessed it)
WATCH YOUR TIMER BARS.
Basically you need to watch to Stomp and the 3rd Meteor Slash timer bars syncing to within 1-3secs of each other. The easiest way to show this is a follows:
You are tanking:
5----------4----------3----------2----------1----------3rd Meteor Slash----------1----------2----------3---------4----------5----------
----8----------7----------6----------5----------4----------3----------2----------1----------Stomp----------1----------2----------3
The above shows your timer bars. You can see that your 3rd Meteor Slash will hit, then 1-2secs later a Stomp will hit. In this case it would be pretty dangerous for the other tank to taunt as soon as the 3rd Meteor Slash hits you because he would then need to tank with the Stomp debuff while the healers are still ramping up from the tank swap.
What you do in this case is that you DO NOT say "3" as soon as the 3rd Slash hits. You wait until you see the Stomp Animation from the boss and you take the Stomp debuff. You then IMMEDIATELY say "3" on VT to cue the other tank to taunt.
Doing this correctly will mean that you take the Stomp, the other tank taunts and then will be able to tank the whole phase without a Stomp debuff.
That's about it then. Arguably the most challenging fight for a Feral Tank before Muru. You need to tank successfully and out-threat a fully buffed dps-heavy raid and also contribute decent dps in Catform (you should be able to get around 700dps over the fight). On top of this you need to use Potions, Barkskin and trinkets to mitigate as much damage as possible. Its a very intense fight and a true test of single target tanking and multi-role playing for a Druid.
I've made a handy flow-chart of the fight for your pleasure
