Here is some calculations I made while wondering if this trinket has any use at all, despite the fact that it drops from endboss of SSC (Vashj). The static threat reduction value itself works in favor of fast attacking classes as defined below, but inaddition the value is extremely small to have any real effect, hence rendering the trinket completely irrelevant. Let me show you how it effects. Example damages are pulled out of our Magtheridon kill.
http://cromfel.battlefield.fi/wow/ww...ridon_30.5.07/
Magtheridon - Rogue DPS chart
Present from 20:40 to 20:49 (71 %) DPS time : 8minutes (95 % of presence),
DPS : 1209
Critical attacks:
399
Threat reduction:
21546 (399*54)
Total damage: 651718
Total % of reduction:
3.3%
Magtheridon - DW Warrior DPS chart
Present from 20:39 to 20:50 (80 %) DPS time : 9mn (88 % of presence),
DPS : 836
Critical attacks:
250
Threat reduction:
13500 (250*54)
Total damage: 465762
Total % of reduction:
2.9%
Magtheridon - Retribution Paladin DPS chart
Present from 20:40 to 20:50 (74 %) DPS time : 8mn (86 % of presence),
DPS : 778
Critical attacks:
107
Threat reduction:
5778 (107*54)
Total damage: 394631
Total % of reduction:
1.5%
As we can see, this trinket gives little to no threat reduction that would be worth gaining. In best case scenario, we have extremely fast attacking rogue gaining only 3.3% threat reduction from the trinket. And worst case scenario we have slow 2hander equiping Paladin who gains only 1.5% threat reduction. This item really needs rework. Not only it should have atleast twice the threat reduction to be considered even remotely useful, but in addition it should be percentual to be equal for all attack types. If it was for
example 20% threat reduction from critical strikes, we would end up with following result.
Paladin total DMG: 394 631
Critical strike damage: 141499
Threat reduction: 28299
Total threat reduction: 7.2%
Rogue total DMG: 651718
Critical strike damage: 239891
Threat reduction: 47978
Total threat reduction: 7.4%
This kind of total threat reductions from such boss loot would be considered reasonable, and someone would actually bother using the trinket. Not to mention that the percentual reduction would be equal to all classes and not favoring some types of combat. All in all: Currently the trinket is nothing but Void Crystals.