The first, Grand Widow Faerlina because someone else besides the raid leader mistakenly called out a sacrifice and before I could realize what happened, all 3 tanks were dead. That enrage is a bitch. Tips from a pro: If you get too easily distracted, like I do, make sure you tell the raid leader only to call out the sacrifices. If you plan on watching the fight yourself to make sure that you're doing what you need to, watch for her to get big and red. I suppose that's typically the sign of an enrage.
The next one was Razuvious. Besides not entirely knowing what to do, this was seriously a really fun fight. We wiped on him once when me and the other priest really didn't know what was going on at all. Then *I* caught on, but apparently the other priest did not. She went through 3 of the Understudies before mine was dead. Maybe that was my fault for not taunting soon enough. The second time, we wiped again. The third time she went through her Understudies fast *again* and I just had the one, but this time the DPS was fast enough that we got him down. Tips from a pro: Personally, I hate talking on vent, so I never do. And the fact that this fight requires decent communication between priests is bad for me, but I found my way around it. I'm assuming the other priest did too, because we didn't talk hardly at all. After I let her taunt Razuvious off of me, I simply watched my MC timer and after around 20 seconds I reapplied bone shield and taunted. However, it would probably be much easier if you actually communicated.
All in all, it was a good run, though. Four bosses down. All of arachnid and Razuvious in military. And Myss grabbed some new wrist pieces while there. It now no longer looks as if she's wearing elbow-length gloves, however, and is certainly not as a pretty. C'est la vie!