You gain uptime on 100% dot speed, you are basically trading some uptime of haunt, for uptime on MG, using less shards by using haunt less on the low damage part of your rotation, means having to drain soul less, which is a huge time sink away from maintaining MG.

Also in the sample sequence, there is a point where it does "G9GGGG" where G is fel flame, I don't think there is any point where using fel flame that many times in a row would be a dps increase.

And awesome, looking forward to messing around with the priority.

I would think Zinnin's point or method of not using DS outside of execute range would be a more viable option for helter skelter or higher movement type sims. In those cases 4 sec channel ticks become far less realistic and the increased uptime on MG is more likely to offset the lower haunt uptime. Is the upcoming release going to be able to model helter skelter or strictly patchwerk at this point?

For Destruction, wouldn't Grimoire of Sacrifice provide a larger damage increase than Grimoire of Service? Currently in beta it increases the damage of Immolate DD, Conflagrate, and Incinerate by 30% (60% for the first 15 seconds).

Conflagrate and Incinerate provide 18161 DPS according to the latest sim, and increasing that by 30% would provide 5448 additional DPS (well above the Service pet's 2272). Accounting for the 60% bonus at the start and Immolate's direct damage would increase the gain even further.

Main thing You're missing(and current beta build is aswell) is the fact, that sacrifice will kill your main pet, so you're not only losing service's pet dps, but your main one aswell, and that's around 8.5k dps - which doesn't mean it won't be competitive in retail version(and one could hope it will), especially that it currently boosts Shadowburn aswell. Problem is we don't really know which one is wrong - the tooltip(s), ingame implementation, or both really. It certainly would be nice for it to be viable not only for *those* fights.

On another note - is the mana time line in simulationcraft working as intended? It seems plausible for affli/demo, but for destro it's way out-of-whack, or is it an error due to it being average timeline of all the iterations aswell?

I really can't see anything wrong with the mana timeline graph for destruction.

They changed soulfire to allow meta auto attacks to continue while casting it, and buffed the duration to 30s. I am curious if there is a noticeable difference between holding them for meta, or only using them out of meta.

Maybe I'm looking at the results of the 501 simulation wrong, but it looks like destruction never goes below ~80% mana - with two exceptions at the start and in 2/3, and even those are merely by 20%.

I am intrigued by Affliction's jump to the top of the charts. The only change I saw was DS ticking every two seconds instead of four. How did they gain ~7kdps?

If a channeled spell ticks twice as often it does twice as much damage. It turns out they also nerfed the spell power coefficient, so it's not quite a doubling of its efficacy, but it's still a major buff.

The results for Affliction show ~12% of total dps is associated with the Dragonwrath Legendary as opposed to 1.5% and 0.5% contributions for Demonology and Destruction, respectively. Is this an independent error or a synergy between the "new" Drain Soul (Beta Build 15689) and the Legendary proc value?

It certainly doesn't sound/feel right to me, at least as far as I remember it working out at 85. Sadly I'm currently 89, so I can't double-check and could be wrong for sure.

Are the stats in ability details correct/final ones? They're named "base_cost" and seem to suggest that incinerate's mana cost is only 5100 mana which I'm sure can't be right, as incinerate costs 51k out of a 250k mana pool @ 89, so 20.4%, and I'm pretty sure all the spell costs are % based now. Same situation for immolate/conflagrate - sim suggests they're both 1/10 of their mana cost @ 89 aswell and mana pool doesn't grow that fast. Rain of fire sounds about right though - 36k/100k in the sim, 85k/250k or 34% @ 89.

Edit:
I got a friend to confirm it for me - conflag 4k, immo 12k, inci 20.4k @ 85.