I'm getting drastically better results in Sim while dual-wielding in unholy presence then I am from frost presence. If I was using a 2 hander this would make sense, but according to the guide here dual-wielding I should be dpsing in frost presence. Is simulationcraft broken or is it due to some anomaly in my stats?

Here is my char profile I'm importing into simulationcrafts latest release (4.0.6-8). I'm trying to figure out if this is a simulationcraft bug or if the simulator is correct and I should indeed be dpsing in unholy presence.

Character profile: chardev 8 - Cataclysm Beta
In simulation craft I'm running fully raid buffed no DI or FM and no pre-potting.
I'm getting in frost presence: 19406 dps
in unholy presence: 22482 dps
That's a pretty wide margin. Any thoughts on this?

Thanks!

Update - I'm getting this for other DW profiles I have found. Has anyone else found this as well?

2h Frost here. So recently I've been having an issue with moments where I'm maybe 1.5-1 seconds from being able to oblit, and I have enough rp to FS, and just as I hit my FS, KM procs and I blow it on FS instead of waiting a short amount of time to get a much larger oblit off. Because this happened frequently enough, I've started using a swing timer just to give me a little heads up on when KM might proc for a larger oblit hit instead of FS'ing.

My main question now is would it be a good idea when you only have 2 runes available w/ Obliterate taking priority, and say you are mid-swing, to wait until you get a white hit off for a potential KM to proc, and then use oblit, or just use the runes as soon as possible, potentially losing out on a KM hit.

I know this is highly situational, but with the rate at which I go through runes as 2h frost, this scenario happens often enough that it may make a difference in my total output.

As long as you're not wasting resources, you're not losing dps. If waiting a fraction of a second causes you to start capping RP or having 2 runes of the same type sitting unused, then it's a dps loss. If it doesn't, you're not losing anything really. The only time that isn't true is when runic empowerment starts proccing a lot, in which cause the FS->RE->oblit->FS feedback loop would make waiting a dps loss, but only because that kind of feedback tends to resource cap you for a few GCDs.

I am.
I've also encountered a similar issue with using Kahories simulator, though not as radical as with SimC.

What irritates me is that the 'Waiting' result (defined as 'percentage of time in which no action can be taken other than autoattacks') remains at 0.00% for both Frost and Unholy spec, meaning that im pratically GCD capped even in Frost presence. And as far as I believed, that should mean that I wouldn't gain any DPS by switching to Unholy.
However SimC suggests that switching to Unholy produces enough additional strikes to outdps Frost. I'm seeing 70 more Runic Empowerement procs in Unholy if I read the Procs table right. Also 'rune_abilities' under Gains increases dramatically, but I have no clue what that means exactly.

The main factors in damage contribution change is Frost Strike and Obliterate. FS jumps from 5511 to 7489 DPS (+1978) and OB from 7071 to 7937 (+866).
(With overall DPS from 21373 to 24612 (+3239).)

Overall the damage per strike is reduced, so this part of the calculation seems to be correct, it's just the pure additional amount of strikes that seem to push Unholy ahead.
Was anybody able to reproduce this in game?

Erm yes, you're right. It seems you should switch to Unholy Presence because you're GCD capped, as it enables you to use more of your ressources.
Taken from the starting post:
So, this entire scenario seems to have it source from being GCD capped in Frost Presence. Not sure how this translates into real gameplay, as my DK is only my alt and raiding with her is rather infrequently at the moment.

Ok there's maybe something I can't understand but:


Imageshack - stackingcrit.jpg


and


Imageshack - stackingmastery.jpg



shows how even if simcraft suggests us to reforge all to crit, stacking mastery gives a better results.

Is it another bug or simply did I miss something?

And of course I also had the same dps increase, at about 3k, running sims in unholy pres.

Well, the difference in DPS is only 10. Since SimC simulates 1000 or 10000 attacks the DPS of each run can differ in a small amount. Your screenshots actually tell us, that there is no DPS gain in stacking crit or mastery. Both result in nearly the same DPS output.

There are a variety of explanations and reasons for the inconsistent scale factors. For instance the std error is 10 dps, so increasing your iterations would be a good idea to get that lower.

Another thing is that you're simming the value for adding mastery and crit during the runs, but are swapping the stats. While the stats weights are generally close for small ranges of +/- numbers, like when reforging a piece of gear from one stat to the other, doing 400 of the stat at once is not. The recommended setup would be to reforge/replace your items one at a time, resim (you don't have to recalculate the scale factors) then repeat, making changes as your dps increases. This is a more tedious process, sure, but scale factors aren't designed to swap 400 of a stat at once, they should be reevaluated after every piece of gear. Once that is finished, you can calculate scale factors and have an idea of what to get for your next piece.

Again to reiterate, 10,000 iterations is low for scale factors, don't use scale factors to make massive changes to your gear at once, and always create your own scale factors for your own gear.

[e] Removed the deterministic_roll portion per an IRC discussion on the evils of RNG

I really thank you for explaining me how to use better simcraft

It only sound funny to me because I don't know how simulation works, I can't imagine how adding only a small amount of a stat each time could be a dps gain instead of adding the whole amount of that stat, but I trust you

If I buy 100 apples taking them one by one it should be the same if I take the whole box with 100 apples inside, the results should be the same in my opinion, a hundred apples to eat.

Anyhow I'll resim changing little by little to see how it will change and I'll spend few gold to see if it works.

What? Aren't scale factors for exactly this, to see how one stat performs if you add large chunks to it from your current value?
If not, what's the use of it if you have to reiterate over the whole process for e.g. every 50 stats you change?

Also, 400 points doesn't strike me as that much as well. The EP calculation is done with 300 points added to one stat, so shouldn't adding 400 be somewhat conforming to the EP values?
(I acknowledge that while he added 400 to one stat, he also reduced other stats by the same amount, however the point still remains, what's the use of those EP values / scale factors if they don't provide any help for exactly such decisions?).

Tonight I ran as DW frost in with stat priorities as Str>hit>haste>crit=mastery, and ran in unholy presence. From the numbers I was seeing in Bastion and conclave tonight, I was doing more than previously when I was stacking hit/mastery or just mastery.

Once they upload the parses from tonight I'll compare previous runs to get a better idea, but I can say that I was placing higher in the meters with more dps/dmg than I can remember from other runs.