Dual-wield frost tanking threat is effected by the weapon speed.
Using my own gear (i232 average), the simulated difference is that those two slow dps weapons (always both with [spell]Rune of the Nerubian Carapace[/spell], for stamina), do ~13% more threat than fast/fast.
A slow/fast combo is 8% more threat than fast/fast.
With slow/fast, if you put fallen crusader (“FC”) on the fast off-hand, you get about 12% more threat than fast/fast, which is another nice middle-ground. FC is better than Razorice (“RI”).
With slow/slow, if you go fallen crusader main-hand and razorice on off-hand to max out threat, it’s a 6% threat gain over two Nerubians. Quite a lot.
Fast/fast with FC and RI, is 6% more than fast/fast Nerubian.
Presumes you’re still over 540 (or 535 defence for 5-mans) without Nerubian. I value stamina highly, so wouldn’t recommend DPS runeforges in a raid (unless it was Ulduar or something below your gear level).
Using i232 gear levels, for a 5-man tank. I include the absolute threat values from Kahorie’s sim (v1.202), then I indexed them to a baseline of the fast/fast, and put that index in brackets (it’s a percentage). Obviously, the damage difference is because of strike damage being higher with two slow weapons.
At the extremes, two slow weapons with two DPS runeforges give 21% more threat than two fast ones with tank runeforges.
|Weapon combination||Nerubian x2||Nerubian and FC||FC and RI|
|Slow / slow||5166 (1.13)||5377 (1.18)||5509 (1.21)|
|Slow / fast||4937 (1.08)||5097 (1.12)||5274 (1.15)|
|Fast / fast||4558||4729 (1.04)||4850 (1.06)|
To save me time, these are only 75 hour simulations (normally I do 150), so the degree of accuracy isn’t as high, perhaps +/- 0.5%. The used ICC aura to reduce dodge.
Noob question on parry
Noobs believe parry generate lots of threat and ask what about [spell]Rune of Swordbreaking[/spell] then? Surely the extra avoidance giving more runestrikes is good for threat? What’s 1% avoidance worth in terms of threat?
If I increase avoidance by 1%, the total damage contribution from rune strike goes up by 0.2%. Total TPS for all damage goes up so marginally, it’s meaningless: +0.05%. (I did 150 hr sim to get enough accuracy).
How about the parry-haste you gain from parrying the boss? Let’s say you have a 1% extra chance to gain a 50% to 75% chance to gain a parryhaste on one auto-attack, which is contributing ~15% of your total damage from both hands… pretty lame isn’t it. Like 0.075% gain.
Swordbreaking then give 4% parry rather than 1% parry and 1 % dodge (its +1% miss doesn’t proc rune strike), so about 0.125% more threat in total from +2% more parryable avoidance. Useless. Stick with Nerubian for 2% stamina.
My philosophy remains to gear and spec for survival first, threat second.
In 5-man heroics, you don’t have much issue with survival usually, so you might as well gear up for high-threat. I know some well-geared tanks who do 5-mans in their dps spec and wear tank gear, for this same purpose. Some warriors take their pants off to get enough rage to tank properly.
In raids, survival is king unless threat starts to become a glass ceiling vs enrage timers.
I personally like the slow/fast combination as a middle-ground of gaining tank stats from the fast weapon (it’s about 4.5% less threat than slow/slow), with two Nerubians.
You decide what to do based on your gear vs your content vs your raid dps. Remember that weapon iLevel plays a large factor in damage too, so generally you should use your best weapons.