WoW Insider's Guide to the Omnotron Defense System
by Michael Gray 
Jan 4th 2011 at 8:00PM
The ODS trons all share a joint health pool. They activate in random order and switch during the fight when each tron runs out of energy. Your DPS needs to stay focused on the most recently activated tron. You can tell which tron will activate next by the beam channeling to it, which is a good sign for your tank to pull the current tron to the relative opposite side of the room.
General strategy
Arcanotron (arcane damage)
- Power Generator summons a blue circle under a random target. This increases damage by 50% of all friendly and enemy targets within 5 yards and lasts 1 minute. Drag the constructs off, and have DPS stand in the blue circle for a DPS boost.
- Arcane Annihilator is a simple, huge nuke that can be interrupted.
- Power Conversion converts incoming damage into increased DPS. Purge or steal the spell or stop DPS. This usually forces you to switch to the next tron.
- Lightning Conductor infects an enemy for 10 seconds, causing it to inflict nature damage to its nearby allies every two seconds. It targets one raid member and causes him to damage other nearby raid members. If you are the target, run away from the raid group.
- Electrical Discharge inflicts 29,250 to 30,750 nature damage to up to three enemies within 8 yards. Damage is increased by 20% between each jump. Spread out to avoid turning this into a raid killer.
- Unstable Shield Attacks against the Unstable Shield cause a Static Shock at a nearby enemy's location. Static Shock inflicts 58,500 to 61,500 nature damage to enemies. When this ability is active, stop DPS.
- Incineration Security Measure inflicts 14,625 to 15,375 fire damage every 1 second for 4 seconds. It can't be prevented, so you must heal through it.
- Acquiring Target hits a raid member with a red beam. After 4 seconds, Magmatron will begin to channel his Flamethrower on the target, inflicting 34,125 to 35,875 fire damage every 1 second to all enemies in front of him for 4 seconds. Heal the target, and everyone should get away from the target.
- Barrier absorbs 150,000 damage and if the barrier is broken, it releases a gale of flame inflicting 73,125 to 76,875 fire damage to all enemies.
Toxitron (nature damage)
- Chemical Bomb fires a Chemical Bomb at a random target, causing a Chemical Cloud at the location. The cloud doubles damage taken. This affects the constructs as well as raid members. Get out of the cloud, and drag the boss into it.
- Poison Soaked Shell applies Soaked in Poison on melee and spell attacks, which inflicts nature damage every 2 seconds. Soaked in Poison can stack up to 100 times, so be careful to watch your stacks. This debuff will actually increase your damage too, so you may wish to balance the number of stacks you get against how your healers can keep with it.
- Poison Protocol creates a Poison Bomb every 1.5 seconds that will explode after coming in contact with its target or after being killed. The Bomb fixates on a single raid member and moves toward him or her, then explodes for massive damage on contact. Stun or snare the Poison Bombs. Kill them with ranged attacks.
Other resources
- Tankspot's guide to the Omnotron Defense System
- Wowhead loot list and information
Ready Check shares all the strategies and inside information you need to take your raiding to the next level. You might also be interested in our strategy guides to Cataclysm's 5-man instances, and for more healer-centric raiding advice, visit Raid Rx.Filed under: Ready Check (Raiding)
Reader Comments (Page 1 of 1)
Stephen Jan 5th 2011 1:04AM
A group of golems so insidious they grew mustaches
Nivo Jan 11th 2011 1:36PM
Has any guild successfully tanked this solo on the 10 man version?
Ryan Singer Mar 3rd 2011 9:07AM
Our guild solo tanked it (10 man) on Tuesday.
Cryoh Jan 31st 2011 7:10PM
Extra note for Arcanotron: Have your healers stand inside the Power Generator circles as well, since they provide 1250 Mana per 5 seconds. Of course, you don't want to do this if Electron is up.
yoake Mar 10th 2011 9:41AM
[b]Toxitron and adds[/b]
The most difficult part about this encounter is toxitron. DPSing the adds is mandatory here. You cannot stun the adds, however you can slow them.
Hunters should be ready to use an icetrap and warlocks can for example use a glyphed shadowflame (70% slowed) on toxitron's adds. If they are slowed they are easily kited around the room. There is a good guide about this encounter at http://25man.com/cata-guides/omnotron). It is the most detailed guide I have found on the internet and it helped us master the encounter.
Martin Mar 10th 2011 2:28PM
I agree. The adds should also be prioritized based on the target, healers first (though it's usually not an issue since they die so quickly)
Martin Mar 10th 2011 2:26PM
This is by far my favorite fight in Cata so far. My guild still has a lot to down but this is a council fight done right.