Upcoming Changes section added to the OP. Very preliminary, but should suffice until actual numbers are calculated.

Technically, the glyph of SS change makes your rotation 60 seconds, not 30, due to death runes and horn cooldown. It's really just best to do as you've always done and think of it not as a rotation but as a priority system (diseases -> rp dump if capped -> FU strike -> blood runes to death runes -> rp dump if not capped -> horn).

Assuming the glyph follows the mechanics of the moonkin and warlock equivalents, it should just add a flat 3 seconds to the disease duration, meaning that yes, they won't be on the same timer (since they will have different timers remaining when that 3 seconds is added). It also means that, yes, no disease clipping. It's a very nice buff, and very well thought out.

If the glyph doesn't extend EP, than it becomes worthless. Regardless of the potential raid dps loss, it's a personal dps loss due to the CF portion of the debuff. If EP really is unaffected, then a lot of assumptions change, and not for the better. I can't imagine an oversight of that nature - at least not one which makes it off the PTR - but we'll see, I suppose.

I'm not sure how maxed necrosis/desolation play any role on Glyph of SS. Unless I am missing something stupidly obvious, there's no connection. Otherwise, 1 SS > 1 PS and 1 IT, especially with the new Subversion.

Edit: Oh, oh. I see what you're saying. That's a poor comparison though. Even without the Glyph of SS change, the new Subversion + the new Dirge + Glyph of UB = SS wins out regardless (probably, anyways - that's what needs to be determined exactly), so you can't just say "GoSS is only a dps increase if it's better than 1 talent point + 1 SS - 1 PS - 1 IT". That's not the central point. It's "Is 3/10/58 better than 3/13/55 when you account for the new Subversion + the new Dirge + either Glyph of Unholy Blight or Glyph of Scourge Strike".

The extra talent point issue isn't Glyph related, and the new Glyph is not the turning point in the Ob vs SS matter.

Indirect connection. I'm talking about 3/10/50 maxed epidemic vs 3/10/58 maxed necrosis and desolation.

In the maxed epidemic spec, we get 30 second diseases that gain us 1 SS every 60 seconds, but we lose 1 talent point in either necrosis or desolation.

In the maxed necrosis and desolation build, we lose that extra SS every 60 seconds and have 24 second diseases.

So is 1 SS more dps than IT, PS, and 2 talent points.

SS will hit harder and crit more as well as free up 1 GCD every 60 seconds which can be used for a DC, especially on a fight with much use of AMS.

Edit: Not talking about oblit, I know the dirge and subversion changes will kill that.

I misunderstood, I see. My apologies.

So if I am understanding correctly this time, you're essentially trying to see if using GoSS in place of Epidemic and following your regular rotation is a dps boost over taking Epidemic and GoSS?

If so, I'm thinking the former is superior. It comes down to 2 talent points or the difference between 1 GCD every 30 seconds and 1 SS/20 seconds minus 1 PS + 1 IT/20 seconds.

I completely missed that possibility when reading the glyph change. Interesting. And then you also have to compare 2 talent points or the difference between 1 GCD every 30 seconds and 1 SS/20 seconds minus 1 PS + 1 IT/20 seconds or Glyph of Unholy Blight. Time for some math.

I didn't consider a 3rd option with epidemic and UB glyph.

I know UB depends person to person, but from my most recent parse (a couple weeks old cause of a broken hand), my overall UB dps was 2.1%. 40% of that would add about .84%. This is with a 3/15/55 spec.

Might not be the strongest option. Guess we'll see

It seems upon first consideration that not taking epidemic in favor of maxing necrosis (~.7% per talent) and desolation (~1% per point) would probably be an increase over 1 scourge strike per 30 seconds, but it needs to be compared against at least two alternatives that I can think of.

1) glyph of SS and epidemic, with 4/5 necrosis and 4/5 desolation -30s rotation
2) glyph of UB and epidemic, 4/5 and 4/5 -20s

At this point in time I can't run any numbers on that, and they would be fruitless since it would be only for my gear, but Consider, when you're crunching numbers, a look at both of those would be in order.

2 points in Necrosis/Desolation >= GoUD > 1 point in Necrosis/Desolation. Using the current sim, it's easy enough to see that much, so there is that.

It's more between the other two options then.

Edit: Also, to the above, Desolation is more like ~0.85% dps a point (it only affects your damage, remember, not that of you and your ghoul/garg/army).

Also, the sigil of virulence proc buff has been changed to "Unholy Force" and the T9 2P bonus to "Unholy Might", so we don't have three identically named "Unholy Strength" procs to watch now.

This is amazing, and solves my problem from earlier. Nice catch!

I know it doesn´t fit good to the topic.

What is about 2/17/54?

dr_AllCOM3 I don´t think 12/0/59 will outbeat the 3/10/58 (bladet armor does not scale good enough)

I personally think one SS is more DPS then Necrosis or Desolation maxed out even if you crit quite often with white Hits (SS is top of the DPS list, then White Dmg, then DC then everything else. I still hope someone does the math, cause it´s long time ago i´ve tested this with totaly different gear and sigil)

Black Ice scales the SS too, but i don´t want to tatally doubt it, there are many gear changes like weapon DPS.