Yes. Imp Immo Conflag seems like the destro set.

If the "new" glyph of Curse of Agony adds on two large ticks instead of two medium ticks, I don't think the glyph would be that great.

My medium ticks for about 976, and my large tick is about 1159 (I'm affliction). That's a difference of 183 dmg.

183*2 / 28 = 13 dps increase. Add in the original forecasted dps of (Shadow Bolt dmg) * 0.0029166666666666666666666666666667 more DPS (my Shadowbolt hits for 6.4k), and that's 18 more dps. Total is about 30-35 dps.

It's a nice glyph, but I don't think it'll scale that well.

It's two extra even higher ticks at the end. Completely unspecced, but with CoA glyph on PTR:

272, 272, 272, 273, 345, 346, 345, 345, 417, 418, 417, 418, 490, 490

Edit: Naked values: 71x4, 144x4, 216x4, 289x2

(289-145)*2
*1.13
*(1+2*0.05+5*0.03+5*0.01)
*(1+5*0.02)
*(1+3*0.04*0.35)
*(1.2)
*(1.01)
*(1.03)
605.36 more damage

605.36/28 21.6 dps increase then the current version coa glyph

If one was to believe SimCraft, the CoA glyph would be better than the Corr glyph, even before the coming buff.
I don't know why but can only imagine that in practice, you are not able to refresh every dot exactly the moment it runs out because you might have to finish casting your filler spell. Thus, you can gain much more than just 1 gcd every 168 seconds by glyphing CoA. Plus, the corruption glyph is hardly an improvement during the sub-25% phase, while not having to refresh your CoA as often can really help getting more of those nifty DS ticks in.

SimulationCraft with standard templates, 25.000 iterations:

Glyph of Corruption: +17 dps
Glyph of CoA: +39 dps
(over no glyph)

Of course, even with so many iterations there still are fluctuations, but the CoA glyph comes out ahead by over 20 dps all the time.
I'm not sure if it is modeled correctly, but the displayed numbers seem to indicate so (CoA damage per cast scales linearly with the increased duration).

CoA is modeled correctly for the 3.0.3 version, yes. Keep in mind that Simulationcraft models lag, heroism, mana/lifetap, etc,, something pure math usually doesn't.

The lag parameters in the default raid_80.txt config file adds 250 ms to every instant cast. And the time that you're saving every 168 seconds isn't just used to cast shadow bolts, it's used after 25% to cast drain soul, which will be under the effect of heroism, etc.

I currently have Imm and Imp and nothing to put in my third slot. Should I just stick CoA in there or go with like Healthstone or something? CoA appears to be a DPS increase (slightly) and better than a non-DPS glyph I'd think.

new agony glyph is what im going to get instead of glyph of corruption. a bit simplified rotation and less time wasted when drain souling(below 35% passive 12% damage buff and drain soul as filler after 25% is pros for CoA glyph since agony scales better with final spelldamage multipliers and less time wasted for refreshing coa.) .

SB multipliers in Raid;
1,15 shadowmastery-1,03 BM hunter-1,13 Ebon plague
final multiplier before %35 passive buff=1,33


CoA damage Multipliers
1,1 improved CoA-1,2 Haunt-1,1 Shadow embrace-1,05 Contagnion-1,15 shadowmastery-1,03 BM hunter-1,13 Ebon plague

final multiplier before %35 passive buff=2.04

"after %35, calculated dps difference between new CoA glyph and Corruption glyph will be higher than rest 65%."

I still don't think that math is valid because you are not taking into account what you are doing while CoA is up. It's simple common sense, longer duration = more time to do other stuff. This math would be true if all you were doing was casting CoA, but we aren't.

Look at it this way. If we throw SB into the mix within the 24 seconds that an un-glyphed CoA allows us you can cast almost 11 SBs. Within 28 seconds you can cast about 12.5. That's 1.5 more shadow bolts. Now lets say your average non-crit SB hits for 3500. 3500*1.5 = 5250 divide that by 60 seconds and you have an extra 87.5 dps.

the DPS you gain doesn't come from the actual CoA, it comes from the time you are given to do other things.

The Glyph doesn't extend the fight 4 seconds for every CoA you have, it just shifts back your GCD 4 seconds every CoA. You're still going to be doing the same refereshing of dots + fillter you're already doing. The only difference is every 168 seconds you save 1 of those GCD's by not casting CoA again.

CoA. It's DPS increase isn't that great.