I had done the original testing on Razorice damage, though I don't know if they ever changed it from the old terrible that it was, but assuming its the same I'll reiterate:

Razorice does 2% of the base damage of whatever weapon you have equipped in your mainhand (assuming heroic BVB - 456-847, this equates to 9-17 damage + %magic damage modifiers). This damage is unaffected by attack power, crit, armor penetration, or which weapon is actually enchanted with razorice, so the only way to noticably increase the damage done by razorice would be to use an extremely fast offhand with RI and a very slow/high damage mainhand - And even then the extra damage gained by using razorice would not be worth the damage loss to your strikes.

As said previously, there may be other reasons such as offhand strikes never missing as a reason to use FC on your offhand, but understand that there is no benefit to razorice directly regarding which hand is enchanted, unless you're forced to use sub-optimal fast weapons for other reasons.

Messing around with a simulator this morning, I switched all my str gems, to the str/haste, and any epic gems to pure haste gems. The interesting thing is that I lost only around 200 DPS, I am beginning to wonder if there is a gear/haste point where haste overtakes the other stats?

I've been wondering this myself...seeing as we already have so much haste, won't we get more benefit if we continue to build up our haste? So many of our abilities already have high crit thanks to talents, and as the graph posted before shows, haste outscales crit rather significantly after you get to a certain point. What I'm going to do is regem tonight before my ICC 25 to Str/Haste gems rather than Str/Crit, and see how it comes out.

Haste isn't like ArPen, it scales linearly so that each point of haste gives an absolute increase identical to the previous points. As you get more of other stats, it's relative value will increase (and yes, there will be a theoretical breakpoint, but we don't really know where that is).

Ok, looking at BiS gear for DKs, it seems like once you get to ~40% crit from gear then haste is better. (This is only concerning orange gems, when you gem Str/Haste rather than Str/Crit).

Changing gems from pure Strength to Str/Haste is a loss in DPS, no matter how you do it. For each gem I changed from +20 Strength to 10 Str/10 Haste, roughly 20 DPS was lost.

(I used the Team Robot sim for these, with the IT glyph, not GoD seeing as sims aren't using GoD properly yet. For each gem changed I ran the sim 3 times to get a good average value.)

*Edit* The increase in haste also increased the value of Necrosis and Blood Caked Blade, bring necrosis up to 6% of total damage, and BCB up to 3.6%.

Would it be more beneficial to enchant my gloves with +15 expertise than +44 AP if I am under Exp cap?

My opener is: IT, PS, OB, FS, HoW, BS, Pest. This gives a decent split between the the death/blood runes and the UF runes. After this, it's very similar to a UH rotation. You don't have to worry too much about watching KM procs as you'll be prioritizing rune usage over KM (pending your rune grace period). Most KM procs will get used before they overwrite since you have so many RP dump phases. The KM procs that do overwrite are usually from RP shortage not from a lack of GCD's to use FS (IE these KM proc's would be wasted even using priority).

Still trying to figure out how to sim this. Anecdotally, it should provide the highest DPS since you are maximizing rune usage without giving anything up in return. KM/FS's may sometimes be pushed back a GCD, but it's fairly rare to proc 2 KM's within that short amount of time. Even if 2 KM's did proc, you would rarely have the RP to use both.

Indeed, while there is a theorycal breakpoint, the same can be said for all other linearly scaling stats. It's true that the most Str you have the better Haste is, but it's equally true that the more Haste you have, the better Str become.

People tend to get confused about stat scaling either because of stats like crit (which suffer from diminishing returns, and that makes so that the more crit you have, the less you gain from each further point) or arp (which benefits from internal scaling, as in the more Arp you have the better Arp becomes). However these are exceptions more than the norm.

Modeling Haste will become probably a lot more complex and interesting in Cata when it's supposed to affect your resource income primarily.

Earlier in the thread someone suggested that rolling cinderglaciered diseases might be a DPS increase over razorice. This idea seemed to go down rather quietly but I was wondering if anyone had done any real testing? Somehow I don't think I can get a sim to prioritize Cinderglaciered diseases and then roll them.

Doesnt the timing that this opener creates end up leaving you no time to pop Bloodtap>Ua>cancelaura blood tap after Obliterating on Death Runes? When I try it this way I end up blowing UA into a frost rune and ruining the rotation due to that opener leaving 1 of the frost runes with 1 second left after the DR Oblit. This happens over 50% of the time and I am playing at about 20ms testing on a dummy. In a Raid I'd imagine it would be worse.

Do you get this issue or do you use UA in another way due to your setup?

Usually it doesn't clash. For me it hasn't really been a problem. If it ends up being an issue for you, waiting to use HoW should fix that. It will move your blood/death runes up 1 GCD.

In this situation, yes, you would delay the OB .8s. You have a grace window on your runes that allows you to have a bit of leeway when you use them. In the situation you stated, if you use OB at time 0 (IE wait the .8s) or you use it at time .7 (FS and wait for GCD), your runes will come back off CD at the same time.