OMNI:
In addition to the Fire guy it is important to note that droping an Ice Trap on Toxitron when he is in position to slow/snare adds is very helpful.

MAGMAW:
A hunter here can solo stand outside. The whole raid (in 10, confirm for 25) can stack in melee while the hunter stays at range on his explosive and icy trap. A single disengage w/ pooled focus for 2x(+) instantly on adds makes it a joke.

Again, save CDs for head phase and remember to remark and tell pet to attack it once down. Also call your pet out just as head phase ends to avoid possible insta-gib if tank isn't whacked right away.

MALORIAK:
Trap Launcher+Icy Trap helps your OT a lot here. In addition, during the Red Phase a hunter can Distracting Shot soak an entire breath w/ deterrence. This is of particular benefit on HM where the breath hits really really hard. It is high risk where you need to FD b4 deterrence wheres off but is also very high reward for healers. I usually do it if I get the debuff since I'm already off to the side anyways. Raptor Strike glyph this phase helps too.

ATRAMEDES:
I think most things have been mentioned for this. An Aspect Swapping macro for this is GREAT for air phase.
Also, having medium sound so Sonic Breath always focuses us since we have so many tools to negate it helps the raid a lot. You can stack off to the side so the raid never needs to react.
#showtooltip Aspect of the Hawk
/castsequence Aspect of the Hawk, Aspect of the Fox
Mastering the use of this macro can be challenging but is essential too maximizing your DPS.

CHIMAERON:
Nothing I do that isn't already mentioned.

NEFARIAN:
New Conc Shot glyph limiting speed during the end of P3 on adds can help. Again, Raptor Strike Glyph on electrocutes and P2 for Shadow Barrage mitigates a lot of dmg.

HALFUS:
Using Explosive Trap over Black Arrow here is very good. More DPS + more LnL procs. Especially on HM where all that extra dmg really counts.

VALIONA+THERALION:
The breath the OP is referring too is Devouring Flame. Using your 2nd pot during Empowered Magic is a good call.

COUNCIL:
You can disengage in P3 after the Elemental Monstrosity lifts you in the air to limit/negate fall dmg.

CHO'GALL:
You can pre-trap Freezing Traps on your stack location to insta-stop and insta-breakout anyone who begins Worship casts.

CONCALVE:
I don't do anything real special on this fight

AL'AKIR:
I don't believe I do anything here not already mentioned.

About ATRAMEDES:

A fellow guild hunter and I were doing some test with the tracking abilities Atramedes uses.
During ground phase we were not able to interrupt the tracking if we used Feign Death. Has anyone recently checked this ? Do you need to use Feign death at a specific time stop Atramedes using his ability ?
During the air phase we noticed that if you used Feign death, he immediately started casting the tracking ability on another raid member, so this might not be the best way to use it.

We were trying this on 10 man normal mode.

Definitely not, you run the risk of putting the tracking on another raid member (and without warning), and Hunters are more than capable of kiting it for a substantial amount of time.

When the air phase starts I usually turn on Cheetah and begin moving in preparation for the tracking. If it's on me, I've already got a head start without having to disengage and can jump-disengage later to get a bit of extra distance.

Cheetah is pretty good in this situation but you have to be careful with it and keep moving. If you stay still for a few seconds you could get hit by the fire and be dazed.

Worgens have their Darkflight too, which is best used here.

You can't Master's Call AoTC dazes. If you pick up the post haste talent though, that's always a nice boost.

I don't think Master's Call works on the dazed from Cheetah. If it did, you could basically macro MC into Cheetah and, with the glyph, get 8 seconds of 30% run speed even while taking damage.

Edit: ADD strikes again. Opened the post to reply & didn't actually do it til 20 mins later.

As far as I can tell Distracting Shot doesn´t work on lvl 87+ (at least) mobs anymore. It certainly didn´t work on the Halfus drake adds and the other hunter in my raid said it didn´t work for him on several other occasions too.

A fellow Hunter in our guild attempted this last night. To confirm the above statement, I pulled the data below from our WoL parse. The parse can be found here for reference.

I can confirm this. At least it worked at several occasions last week as did most other protection CDs like paly bubble etc.

I did also try this today. The fire breath went right over my head and stayed there while i was feigning death. I think it did no damage, but my sound levels reached 100% quickly. Atramedes finished his cast and instantly killed me afterwards.



Btw, regarding Chimaeron P2 (not sure if it's already common knowledge, so I'll briefly mention it):
Before Feign Death you can use Deterrance (maybe even Readiness and another /cast !Deterrance as MM) to buy your raid a couple of extra seconds (Boss can't hit you but you won't lose aggro). You can also activate your pet's growl and send it to another corner of the room. It won't do that much TPS, but several classes can drop their aggro and so this may also buy them some extra seconds.

Heroic Atramedes: Feigning death while the target of one of the adds causes the add to stop casting its sound increasing ability (the exact names escape me).

Regarding Cho'gall: Blood of the old God

as Cypz already said, placing a frost trap when the Adhereant is in place makes sence because you will be able to place a second frost trap when the adds are there, additionally i recommend to place snake traps, combined with "Entrapment" you will get an additional 4 sec. stun per snake trap, so if done right there is one slow area when the adds spawn + first snake trap stun + frost trap stun and slow aoe + second snake trap stun (must be placed after first snake trap is triggered).

Also I place a snake trap, additional to the frost trap, when dealing with Magmaw adds.