This was quite an entertaining fight for a mage. I was asked to join in the fight by a friend-of-the-guild guild and they were learning the fight for the first time. Long story short, I snapped a pic next to his corpse!
Note! The first thing I did afterward was try to start the quest for Dragonwrath. Alas, I didn’t not qualify because this Nefarion kill was in a post-4.2 environment. I’ll have to do it the hard way—by killing a Molten Lord.