With that in mind, I went with a 15/56/0 spec
It's important to note that my aim is to be able to do two things well with this spec. The first, I'd like to be able to DPS in a PvE environment competitively. The second, I'd like to feel useful in PvP Battlegrounds. Thus, some points are chosen for that sort of utility, even though I know it makes my spec not "the best" raiding spec or "the best" PvP spec. It's a hybrid spec. For instance, my PvP needs are what entice me to spec into both Rune Tap and Chillblains. You may want to take the points I "waste" there and put them in Virulence or filling up Dark Conviction (for example).
This also reflects itself in my choice of glyphs. You can see from the link above that I'm going with:
- Howling Blast - To spread Frost Fever and, thereby, Chillblains. Awesome for keeping melee away from demolishers, etc. Also great to spread out the deeps.
- Disease - One button, one rune refreshing of diseases. Totally a must for DPS as it lets you throw in a lot more Obliterates.
- Obliterate - If I'm going to be trying to use more of these, it makes sense to buff it.
- Horn of Winter - Nothing like extending your horn. Think Hodir-ish puns here.
- Pestilence - Spread your disease like a bad brothel.
- Raise Dead - Free Ghoul, 'nuff said.
I'm no where near perfect with it, but when I'm playing well, it ends up looking something like:
IT > PS > OB > FS > Pest > OB > OB > FS (repeating basically Pest, OB's, FS as they come up and making sure my diseases never fall off. Also, I throw in a HB whenever Rime procs... looking for the shinies around your player)
It's pretty simple, fun, and puts up respectable numbers. Watch for your procs and try to be flexible. The more OBs, FSs, and Rime procs you can fire off with buffs up, the better, but don't do it at the cost of running your diseases out.
I know that in the course of my research, it was tough to figure out what DW weapons to use. So here's the easy answer: you want a slower weapon in each hand in order to maximize the damage of your special spells. Since they're calculated with respect to your base damage, and your base damage is directly relational to the weapon speed, you want two slow weapons. Why? Let's say you have two weapons, each with the same "DPS" but one is fast and the other is slow. In order to equalize the DPS, the slow weapons has to have more damage per hit. Since specials are calculated on damage per hit, I think you can see why we say "go slow".
A second important pointer here is that there are only two things that refresh your Improve Icy Talon talent: Icy Touch and Howling Blast. Refreshing the disease with Pest does NOT do it. Usually, I get rime procs often enough that my HB's keep IIT refreshed, but if I see it fall off, I will do a manual refresh and start the whole thing over. You may lose out on some personal DPS, but the benefit to your raid as a whole is usually worth it.
I don't really change up the rotation for AoE situations except to use HBs in place of OBs when I can to maximize my damage. You still will want to put up and spread your diseases first, then weave HBs and RP dumps. As a DK that's specced into HB, AoE situations really let you put up some good numbers. A lot of DPSers will throw in a DnD too, which is good, I just always feel like it screws up my runes. Watch your aggro though, because you can be quite bursty, plus DnD does high threat.
Hit (until cap) > Str > Expertise (until cap) > Crit > Haste
Ewww numbers: Melee hit cap is 263 raw (8%). With Nerves of Cold Steel, we only need to hit 164 (8-3=5%). More hit will still help, as our spells can go all the way up to 17% before cap. Virulence helps with this. Our spells include HB and IT, so after melee cap this stat weight only falls slightly for us, probably being in between Crit and Haste until Spell Capped. Expertise cap is 26 - 5 (Tundra Stalker) = 21 Expertise. Different from "rating". Racials also factor in depending on what weapon you're using, so check that out too.
It's also good to rune you weapon with Fallen Crusader (MH) and Razorice (OH).
That's it for my DPS DK. Pretty short and simple, which is how I do my lone raiding alt. She's a great change of pace and I love to PvP on her, but mostly I raid on her because sometimes I run into save issues on my 'lock or just to knock out old content with newer raiders. It gives me something else to gear when there's "nothing" in it for my 'lock (really, there's always emblems, but like... I've got those coming out the fel ears now right?).
I'm sure a lot of you could come up with better pure raid specs, feel free to leave 'em in comments to help others out who stop by. Also, if you're a frosty DK like me, do you roll with the same rotation? Same basic set up? This is one toon where I know I still have stuff to learn.