I'm not sure when the change occurred, but with Shadowmourne equiped, rawr shows switching the gem in Shadowvault Slayer’s Cloak, Band of the Bone Colossus, and Ashen Band of Endless Vengeance to Inscribed to pick up the +4 agility bonus as a dps increase if you move the expertise gem elsewhere. I’ve tested this with both my toon and the “Heroic All Items Priority List” list. Is anyone else experiencing these results and believe they are accurate? Might +4 agility bonuses be worth picking up along with +4 str in single yellow sockets when using a Shadowmourne?

Edit: Bryntroll and Glorenzelg, the other str based weapons show to keep the bold in yellow sockets, not sure why shadowmourne is different.

Rawr shows that a 4 agility socket bonus (using Inscribed over Bold) is better if you have a Shadowmourne and TAJ, but the difference in the dps gain is less than 2 I pretty much ignore it because it is too small to notice.
In 4.0, you will need more crit rating to for the same crit as today, so using Bold will be better then.

Forgive me if I'm wrong, but if Inscribed is better with SM and TAJ it should be mentioned in the OP. 2 DPS isn't much but it is still better, and I think the purpose of this thread is to advise the best available.
How much crit you will need in 4.0 is a bit irrelevant, cause this is aimed at 3.3.
If you think of 4.0 now you may as well remove the AGI items cause they will be useless for a ret then.

I disagree with Rawr that an Inscribed with 4 agility bonus gives 1-2 dps, so I am not changing it. It is too close to call either way.
I certainly will not be removing the Agility items. This thread can stand as a testament for what was good back in good old patch 3.3. For people playing in 4.0 and beyond, it is worth downgrading a few Tiers to drop the Agility pieces for Plate so you get the 5% strength bonus.

This makes me wonder about the following then. Looking at the BIS list and comparing it to what Rawr says in regards to rings, I am wondering which is the proper ring choice for a hard mode raider who probably won't see a 25 LK kill. Rawr says BIS is Ashen Band of Endless Vengeance and Seal of Many Mouths (heroic) in terms of pure DPS output. Looking at how much Crit you gain from Seal of Many Mouths agility stat, you may get more damage from Might of Blight, but less Crit and having a useless stat like Armor Pen seems kind of useless doesn't it? Plus you gain expertise which pretty much guarantees that with a 4 set Tier 10 you will be at cap with Seal of Many Mouths along with almost 2% crit. If my calculations are correct, you gain 1.98% crit from the Agility while you only gain 1.35% crit from the straight green stat on Might of Blight, however you only get about half the damage output.

So if what you are saying is true about Expertise having a higher value until capped, then Seal of Many Mouths is a superior item for that fact alone, plus gaining more Crit and not having a useless green stat like Armor Pen. I read back a few pages and that is what I have gathered, however some professional opinions on this would be wonderful. Is Rawr correct in this case or is Might of Blight still the BIS item of choice?

Rawr is quite accurate for ret paladins, which is why it Rawr sims are the system of choice for determining BiS. Disagreeing with Rawr is rather pointless unless you have the math to show why you are right and Rawr is wrong.

As far as I know, the only time you might deviate from Rawr is in the case of proc items such as TAJ, Shadowmourne, Bryntroll, etc; the model for such proc items has historically been difficult to tweak properly.

There's nothing necessarily wrong with disagreeing with any sort of gear valuation tool, at least, if you have a good motivation as to why. Rawr is good, but it also has it's flaws.

For Hit and Exp, they're typically valued higher than Rawr seeminly indicates.
The thing you have to realise is how Rawr does it's thing. It basically just models a long uninterrupted fight, and there aren't a whole lot of those out there these days. You tend to be retargetting a lot, and in such a case, missing a SoV stack up can be a noticable hit (pun intended) on your DPS done.

Crit doesn't really shine untill you get 5 stacks of SOV up on a target. Again, since Rawr models a single nonstop patchwork type combat. Any fight with retargettign will decrease the value of crit and increase the value of str/ap/haste by a bit for each additional retargetting. In that respect, I think frmorrison is correct in saying that picking up a 4agi bonus for that extra bit crit isn't going to pay off in the fights that matter.

TAJ seems to be implemented properly. It increases dps, and it also feeds back into increasing DPS of any sort of melee hit proc because of the extra weaponswings.
Shadowmourne is off (and this is documented in the FAQ), if you want to get it closer to real valuation, change it from meleehit to meleeattack.

Interesting points and I certainly agree about target swapping fights. People wonder why my DPS is so terrible on some bosses, but high on others, well it's because getting stacks up to 5 takes time and for some reason I have no problem doing it as a tank but as Ret it takes a bit longer, possibly because of slower weapon speed being a factor. But I do have a lot of melee haste, 2.88 weapon speed outside of raid. I was always under the impression that haste benefits our GCD but would it be better to stick with regular WFS over Herkuml War Token for most cases where you have to target switch and move?

The War Token generally loses its stacks very easily, so in most cases it's better to stick with Whispering Fanged Skull. On fights like Festergut or Saurfang, HWT might actually win out, though.

As far as I'm aware, haste does not affect melee/ranged GCD, but only spell GCD (Consecration, Exorcism, Holy Wrath).