http://www.wowace.com/wiki/Omen
For tracking aggro. Ensure you turn on the ability to also get KLHThreatMeter data.
And remember, everyone in your group/raid needs to have it in order for it to work accurately.
To answer some questions:
How does Omen handle multiple targets with the same name?
Unfortunately, this is a major weak point in any threat library. Multiple targets with the same name are indistinguishable in the combat log, so you can't really tell which one to apply threat to. Therefore, all targets with the same name share a threat pool, and will show the same threat value. This is regrettable, but Blizzard has intentionally not provided enough information to distinguish same-named mobs in the combat log. Fortunately, there really aren't any threat-sensitive encounters where there are a lot of mobs of the same name that you need to dance the threat line on.\
Can I re-color my bar/my tank's bar/my dog's bar?
Sure. Just right-click on any bar in the main display to pull up a menu that will let you set color, size, texture, and font settings for it.
I saw these cool single bars in a screenshot somewhere. How do I get those?
Just drag a bar out of the main display. This won't work for your bar, but will work for your pet and other players. This creates a bar that compares your threat percentage and TPS against theirs, and gives you an estimated-time-till-aggro-gain, allowing you to easily pace yourself to stay under your chosen tank's threat level.
If you want a bar that dynamically follows the tank, pull out the Aggro Gain bar.
Quote from: Kellanon on Tue, 2008-03-04 : 14:47
Ensure you turn on the ability to also get KLHThreatMeter data.
I would actually suggest turning this OFF. After investigation and research (from the author even) it actually makes the data inaccurate because it can only track one target at a time (what you have targeted). Whereas Omen tracks all mobs around you involved in the combat.
Some other things that may interest people:
QuoteDo I need to install Threat-1.0 to use Omen?
No. Threat-1.0 comes bundled with Omen as an embedded library. You only need to install Threat-1.0 if you want to provide your group with threat information without a GUI. As a user, you can think of Threat-1.0 as a stripped down tank version of Omen.
QuoteDo other people need Omen installed for it to work?
Short answer: yes
Long answer: kinda
To get fully accurate data, your groupmates must have Threat-1.0 (or an addon that uses it) installed and running. Any addon that uses Threat-1.0 will satisfy this requirement and will provide full and accurate threat data to Omen. Currently, addons that use Threat-1.0 include: Omen (naturally), Aloft, Assessment, PitBull, Recount and Violation.
If you or your groupmates have any of these addons installed, or have Threat-1.0 installed as a standalone, then they are capable of sending and receiving threat data.
Additionally, Omen is capable of displaying data from KLH Threat Meter, so if your groupmates are using it rather than Omen, you will get threat data from them. Please be aware that as KTM is an aggregate meter and not aware of multiple targets, any values from it will be incorrect in any multi-mob encounter beyond the first mob.
As a parting note, I read a few places that the new version of KLH uses ThreadLib 1.0. This would eliminate any of the inaccuracies, but I haven't confirmed it yet.
That is why knowing how to run an instance is important. Once a tank has marked a mob as the target using Omen or KTH, then the party should be attacking that mob. Once you get past the first mob, the data inaccuracy will make a difference only for stats. If holding aggro on trash mobs is causing trouble, it's time to re-examine gameplay. Turn down the DPS until the tank has full aggro, ensure the tank is bashing, don't drop a mega-heal right off the bat, and so on.
Until 2.4 is released and everyone is using the Blizzard meters, you should have KTH integration turned on. On a boss fight where threat monitoring is the most important, the information is valid, and critical to the tank and healer.
The PTR releases of KTH and Omen do support Blizzard's threat tooling.
I've noticed that since the 2.4 patch, Omen 2 updates like pretty much every hour so it's become like a daily ritual to refresh Omen before logging in - I've even updated it before a raid, only to find that it's been revised again when we actually start - though apparently you're ok if you're only 1-2 updates behind. And, all that said, it looks like it's once again workable, as opposed to the mess it was when 2.4 first hit.
MOST of the updates have been french language updates or minor visual fixes. There have been key versions which break compatibility, but not that often (though last week it was every other version almost but it's calmed down now). It has gotten alot better since the initial 2.4 patch release lol. If you're in the 7xxxx versions you should be good for a while.