You're going to have to give more information than that. For example, is this being run with Simcraft? What buffs are you using? Where are you in relation to gaining extra DoT ticks from haste?

I really hope you're not talking about losing 2k DPS unbuffed on a target dummy. If you are, please run Simcraft instead with the appropriate raid buffs checked.

I simcraft your bnet profile and with DMC:V and Zeth your simulated dps (patchwerk, 50k iterations, all buffs except FM):
33574

And with WoU_390+IotC_384 and w/o reforge on wand and one ring (for hitcap) your simulated dps:
34534

Oh my I apologize, I'm stupid and didnt have the new version of simcraft still :<

I have the T13 4piece and I am curious what the haste breakpoints are (if any worthwhile) above 2200 haste with Dark Intent.

I have 2893 haste at current and have DI in every raid. So my question is with the 4piece bonus from T13 is what are the breakpoints between 2200 - 3000 haste.

From the testing I have done thus far just watching World of Logs attempts on heroic Ultraxion 25man with my current gear setup/reforge setup , doing the normal rotation or going mindspike-mindblast-applydots during each shadowfiend uptime it seems to essentially just be a wash in terms of damage output. Neither really comes out ahead.

So taking the current information if I met the significant breakpoints with haste around the level I am current, would dropping 3-4-500 haste increase the shadowfiend(mindspike/mindblast) cooldown timing enough to warrant that big of a change.

Simcraft with my current gear profile places mastery above haste which isn't unexpected. My question is how much can I drop my haste aka to what breakpoint for the shadowfiend-mindspike-mindblast rotation before it becomes counterproductive. OR if considering this is even worth the effort.

I have seen that chart but it wasnt clear if the chart was taking full raid buffs into consideration before mentioning DI etc.

If that chart was taking full raid buffs into consideration before the mentioning of DI / goblin. I would be able to reforge all the way down to 2284 haste without the concern of missing any haste breakpoints as IDP isnt a breakpoint, though I am not near the 3202 haste mark anyway.

Only haste buff Shadowpriest gives himself omg! (Except DI ofc, which mention at this chart)
And there is a talent Darkness. Which is not optional really.

I just recently started playing spriest again, so I'm not entirely sure on how this new dot clipping mechanic works, it would be great if a thorough explanation was added to the first post. From what I collected by searching internets, looks like it adds the new full duration after the next tick, so if you're just before a haste breakpoint you'll effectively have a shorter lasting dot?
Also, does this mean that when I simply apply the dot, its duration will depend on my haste? Or will it always show the full 15 sec or whatever, but the last second or so will do no damage?

Also, now that I finally got my 4pc, it seems that mastery stacking might be viable for fights where short burst is needed? E.g. spine, hagara? Also, from what I'm seing, the choice of whether to use spike/blast during sf/archangel depends mostly on the amount of mastery, no? Mine is pretty low and I'm not seing any dps increase from doing that. I just tried it on LFR deathwing, using fiend for when cataclysm starts, as a result mind spike was #1 overall, until 2nd phase.

Thanks for the explanation, I kinda figured everything except the rounding part - good to know blizzard doesn't always round stuff down.

More random thoughts on 4pc and ms/mb spam:
- Any addon that shows pet swing timer? Like quartz does, but for pets.
- Would /cancelaura Mind Melt be useful for making sure you don't lose GCDs? I guess there's no point macroing it to spike or blast, though.
- This sounds like a pretty hard thing to implement in simcraft action list, mostly due to pet swing timer. Any ideas?
- I read through most of the discussion, but didn't see any definitive answer to when this would yield a dps increase. My guess is that it's mostly dependant on mastery, so if I could get simcraft to sim it, I could get some nice graphs. Or, idk, perhaps write a small program that would run the rotation.

Obviously any time we need some burst damage, the 4piece mindspike/blast shines. Think Burning Tendons on Spine, Oozes on Yor'sahj. I personally am not getting DPS gains by using it in the regular rotation, the DPS definitely spikes a little but it evens back out due to ramping up the dots again.

My question to everyone is this, would it be advantageous to use this at the start of pulls? Think in terms of Ultraxion, where most guilds are popping lust at the start. We can easily get lust on our Shadow Fiend. Should we be Mind flaying to get Evangalism built up, and then popping AA and Fiend and going with the MS/MB spam? Since we would have had to ramp our dots up at the start regardless, would this be our new optimal opener? So far my dummy play indicates that DPS starts higher.

How would cancelaura on Mind Melt stop you from losing GCDs? Mind Melt at 2 stacks makes your Mind Blast instant, so it reduces the cast time to your base GCD.

Ahh, hadn't thought of pushing the GCD up by casting mind blast - I had simply been holding my mind blast until I got 3 orbs. This makes sense, and might help squeeze an extra mind spike during the fiend duration.