The Spec
The most recent simulations preformed over at the Elitist Jerks forums point to an Affliction Warlock spec being the top dog, raid wise (at a T9 gear level). The spec the use is noted at 55/0/16. The spec I'm using is 56/0/15, a variation of the top spec. I'm not exactly sure what, if anything, differs as I wasn't able to find a link on the simulation report, but I imagine it might involve pet buff talents. I'll write more in-depth about pet choice in a subsequent article, and the short story is that I haven't decided yet, but want to use my Felhunter if it works out. In a small way, this affects my talent choices, but all the big ones are there.
Here's a picture for those of you that might not be able to access the link (note: pic is prolly out of date as I've been playing around with a few points. I try to keep the above link up to date with what I'm running though. Also, this still gives you a good visual of the trees.):
The affliction tree is loaded with all sorts of goodies, and I'm not going to break down each individual talent as they all seem pretty self-explanatory to me. Feel free to leave a question in comments if you have one, but most of them give very straight forward, percentage-based damage increases to our staple spells. The base build is commonly referred to as the Haunt/Ruin build, naming the hallmark talents in each tree. We put 55 well-placed points into the affliction tree to get Haunt and 15 points into the Destruction tree (mostly to buff our shadowbolts) in order to get Ruin. Thus, there is one "extra" point that can be tweaked without losing the major talents.
Within the affliction tree, I think the only trade-offs you have to make are based on utility and personal play style. For instance, when I was using my Succy mostly in raids, I specced out of Improved Felhunter. Since I had to keep those points in the tree in order not to lose Haunt, I chose to take Improved Howl of Terror for an "oh shit" button. This really does nothing to help the raid and probably could have been better spent on a few other talents in there.
In my last spec I'd also had a point in Dark Pact. Before the life tap glyph was in existence, I used to make extensive use of dark pact since it didn't steal any health. Now that I've grown used to life tapping and I sport the glyph, I don't ever find a use for dark pact. As long as I'm smart about it, mana is never a problem. Thus, I moved that point into Grim Reach, increasing my affliction spell range by 10%. The downside to Grim Reach is that without the corresponding destruction talent, you're still going to have to be at the non-extended distance to shadowbolt spam. So that's where my one "bonus" point is going to go: Destructive Reach. This talent has the added benefit of reducing threat caused by my SB. I'm only taking one point in each since thats all I have left to play with. This may or may not be useful in a fight where a lot of movement is required, depending on your playstyle, but I think I'll like the bit of extra range and threat help.
This left me with one point in the Affliction tree that had no home. If I filled up Grim Reach, it wouldn't really gain me anything as I'd still have to be at the same range for to cast shadowbolts. Thus, I put the point in Improved Felhunter. It'll help for those times when the raid my need the pup buff, plus with all the recent buffing of the hunter, I may end up using this guy a lot more.
If you're not a fan of these last few talent choices, you could probably take the three points and invest them elsewhere. I don't know really where else I'd put them to keep in the affliction tree and not lose Haunt. I don't feel like push back is a problem, so I'm not going after the creepy hand talent. Also, I wouldn't use the other curses, nor would I use improved fear. Furthermore, I don't need an improved life tap because as long as I space them out properly, I don't have any problems with mana and feel like my current strategy keeps the buff up without needlessly draining extra life. You may want to stick one of the points in an improved Imp or Succy if you plan to use those pets more and forgo the range. It depends a bit on your personal pet choice. I like to mix my Felhunter in from time to time, so the point won't be completely wasted.
I think that just about covers it. Unlike a lot of other class trees, I feel like Affliction is pretty straightforward and preforms very well when you dump a lot of points into it. There are very few tough choices in my opinion. Really, a lot of it hinges on pet choice, and I need to do a lot more research before I make up my mind on that one.
So that's the raid spec I'm running with. Questions? Comments? I'd love to see what you think.

