There should be no difference in how equip yourself. DW gains more from hit, but not enough to make it a concern in your gear.
Its starting to seem that DW is more efficient in making a strong avoidance build. If you are looking to go this route the avoidance preset on askmrrobot.com is a great place to start.
At lower levels looking for a slower main hand to help decrease the difference between 2h and DW strikes. Sadly at this point end game you have no choice in weapon speed.
Pre ZG/ZA Cookies Tenderizer x2 is best for a mastery build. I dont have any research for what might be best for an avoidance build. They are slow and have good stats.
ZG/ZA Bloodlords Protectors are best for an Avoidance build. Either Rentaki’s Soul Slicer or Gurubashi’s Punisher with the haste reforged to mastery for the mastery build.
Raid Mace of Acrid Death
1. Blood Caked Blade v Virulence
http://public.fotki.com/ruryk/wow/wowscrnshot-50913.html#media -BCB Healing
http://public.fotki.com/ruryk/wow/wowscrnshot-50912.html#media -BCB Damage
http://public.fotki.com/ruryk/wow/wowscrnshot-050911.html#media -Virulence Healing
http://public.fotki.com/ruryk/wow/wowscrnshot-50915.html#media -Virulence damage
My current raid comp is lacking the aura from somewhere else so I am running AB might. Beyond that it is more or less the standard set up for disease tanks.
Currently there is no glyph that is better for DW that we arent already using in the standard builds.
In my current build I use the DRW glyph to gain more threat.
II. Research so Far
1. EJ Sim:
Settings in BloodSim are taken from Zarko's excellent thread on tank stats at Tier 11 (World of Warcraft - English (NA) Forums -> What we look like after one tier of raiding) and damage based on wielding 372 weapons.
- 175,685 health, 32.36% avoidance, 46841 armor, 21 mastery
- Boss hits every 2.4 seconds for 110k-120k unmitigated damage
- 100 eight minute fights
Difference in switching from 2H to DW:
- 7.9% less damage dealt
- 9.8% less threat
- 0.1% less damage taken
- 0.7% less damage absorbed
- 1.1% more healed
With those stats I can see no reason, at all, to ever Dual Wield if it results in equal stats. That's the major caveat. All of the simulations I run assume equal stats (except DW uses 3/3 SoB) between both specs. As yet, no one has been able to give me stat data on a properly gemmed and reforged DW tank setup (recognizing the 3% hit from Nerves that no longer needs to be on gear). It's possible that the tradeoff might be worth it in those circumstances, but I have insufficient data to run the numbers for it.
2. Euliat’s Sim
For a comparison using my stats versus 2x Mace of Acrid Death, this is what the results of the average of 500 trials are (LL used i372 gear, but I don't care to figure those numbers out):
Difference in switching from 2H (2/3 SoB) to DW (3/3 SoB) as of 2011-3-29:
- 0.0% more damage dealt
- 2.9% less threat
- 0.6% less damage taken
- 0.5% less damage absorbed
- 0.2% more healed
None of the default rotation settings were changed, which could change these values. It doesn't appear that BloodSim was designed originally to support DW, which could also change what you'd see in reality.