I just wanted to do a quick write up on the four hunter specs and how viable that spec is in raids. There are not quite as interchangeable as a lot of people think.
This spec has no place in a raid. If you want to go this way, so be it, but you are lowering your damage and hurting the buffs you give to the raid. True Shot Aura is the marksman buff, but it does not scale and thus is inferior to the buffs from the other two trees. This is primarily a pvp spec due to its lack of damage, silencing shot and the "always on" feature of the trueshot aura. The other buffs are triggered and/or mob specific which makes them less appealing in pvp. If you think you can do more damage as a MM hunter, please contact me in game and we can explore it further. I know a lot of people like silencing shot, but in a raid setting most things are immune to silencing shot and compared to bestial wrath's damage there is just no question which is better. Can a MM hunter out damage a BM hunter? Oh yea... will that same MM hunter do MORE damage if they would respec BM? Yep.
The generic damage spec. You want to go far enough into the marksmen tree to get moral shots. This will get you the bulk of the damage talents from that tree while still maximizing the BM tree. Don't split points in improved hunters mark - 0 points or 5 points. I am working on a full guide that will go deep into this spec, but that is a common mistake. Serpent Swiftness is the key to this spec. It is like spending 5 talent points for a ton of haste. I forget the exact number, but I am pretty sure it is over 200 haste. Actually... its better than haste b/c haste doesn't effect your pet and the talent does. The BM's buff is from their pet. When your pet crits it increases the damage done by all party members by 3% and it does stack, so having multiple BM hunters is a good thing. 3 in a group means they are all doing 9% more damage as long as their pets are up and engaged in combat.
This is a utility spec. You are a buff with the right gear, you can do a lot of damage. The key to this spec is stacking as much agility as humanly possible. Only ONE survival hunter should be in any raid because their buff does not stack. 25% of their agility is given back as attack power to the whole raid. Because of their high crit chance they can eventually out damage a beastmaster hunter, but this spec is very very gear dependant. You have to ignore all socket bonuses and just stack agility gems. If you have less than 650 agi unbuffed, don't even think about it. Our current SV hunter is well over 1k agil raid buffed.
Oh.. and the 4th spec...
Elvenbane's Über-Hunter spec- ...
This is for Tag only. If you can top the damage meters with this spec, you must be running deadmines with lvl 20s.
Quickly I'll compare the buffs of the classes:
MM - TrueShot Aura, only effects your party and does not scale with gear. This does not stack. Gives attack power and thus is only useful to melee. A brand new lvl 70 will give the same buff that a T6 raider will. Weakest of the three.
BM- Ferocity- When your pet crits an extra 3% damage (spells and melee) buff is given to your party only. This does stack. Since it is a % buff, it scales with your party's gear. 3% damage bonus to a rogue in greens isn't near as much as 3% damage bonus on a T6 rogue. You want a fast pet so this stays up 100% of the time your pet is in combat. Middle of the road.
SV- Expose Weakness- This is actually a debuff placed on a mob, thus the entire raid gets it, not just your party. Everyone attacking the mob with this debuf received attack power equal to 25% of the hunters agility. This, like TSA is an attack power buff so is of no benefit to casters. Because this buff (or debuff if you like) is dependant on the hunter's agility it scales - a new hunter with 400ish agi won't give near the ap a T6 hunter with over 1k agi will. You have to crit a lot for the debuff to stay up, but you should have enough agility that that won't be a problem. Strongest buff.
MM- Dosen't scale. Party only. Melee only. Doesn't stack.
BM- Scales. Party only. Melee and Casters. Stacks.
SV-Gear dependant. Scales. Raid wide. Melee only.
A more comprehensive hunter guide in the works, there just seemed to be some talk between our hunter on respeccing, so I thought I would put a thing up on it.