That said, there are several abilities that place within the hands of your random raiders the ability to screw up in a spectacular manner and likely take down several other raiders with them. Let's talk about these abilities individually, and from a Discipline Priests perspective.
|Annoying Raid Damage! Lasers Ahoy|
Incineration Security Measure - While this is certainly a dangerous ability, it is predictable, just make sure nobody is near death, and hell, even if they ARE? shield them, bam, you're awesome. If you're in a phase during which stacking up is encouraged, power word barrier is recommended.
Acquiring Target - Here is one of those dangerous abilities, big red laser points at a random raid member, a few seconds later it is followed by a flamethrower effect. God willing, the affected person moves to a zone where there are no other members. If they need help, Lifegrip makes for a good temporary substitution for that raiders IQ.
|Free Mana! Low Damage!|
Arcane Annihalator - This should be getting interrupted all the time anyway, if it doesn't then it still shouldn't be a huge issue assuming it doesn't hit someone who is near death already. However, if Arcanotron pops one of these off while he is standing in his puddle, it will hurt substantially more, and if the person at whom it is fired happens to be standing in Toxitrons chemicle cloud, they'll likely die and you'll be left wondering what the hell just happened.
Whirlpool -Stand in this, if you're awesome and use atonement you'll not only receive bonus mana regeneration, but enjoy increased throughput due to the puddles DPS increase.
Power Conversion - If for some reason this gets stacked up, yell at your Mage to spellsteal it, no mage? Dispel it yourself.
|Unpredictable but low raid damage|
Chain Lightning - Spread out, if Arcanotron is out and you REALLY want to stack up in the puddle then barrier is an option just for the sake of getting the most out of it.
Lightning Conductor - If you need to Lifegrip someone who is oblivious that they have this buff, shield yourself first to avoid getting fried by the jerk
|Don't let the slimes touch you or you'll look stupid!|
Chemical Cloud - Don't stand in this. ESPECIALLY don't stand in this if you think you might take damage in the next few seconds. If you're a tank, stand the boss in this, please.
Poison Protocol - If you have any melee who tend to be slow, pre-shield them, they MIGHT survive contact with one of the exploding adds. If you're put into a situation where someone cannot avoid being hit by one (DC?) then a shield and pain suppression will let them survive it pretty easily actually. Of course you could just lifegrip them and have nobody take damage!
All said this fight provides a plethora of opportunities to use your spec specific cooldowns, so make use of them whenever you can. If you're the type of disc priest who loves to maximize damage, save Power infusion for yourself until you're standing in one of Arcanotron'ss puddles, pop it and any other Spellpower/Intellect cool-downs and go to town. Or give it to a mage who has stolen stacks of power conversion from Arcanotron, he'll thank you.