I expect this'll become the first post of a short series on Zul'Aman. But it might not.
Up until Akil'zon, there's nothing particularly "interesting" for a mage. Pre-Nalorakk trash is pretty normal and the pre-Akil'zon gauntlet isn't that odd either. The main concern about the gauntlet is running out of mana.
Nalorakk is cake. Because of the threat games needed for the tanks to swap between phases, you shouldn't need to worry about aggro after the first transition. Ever. It becomes a fight along the lines of Ragnaros, Patchwerk, Murmur, Lurker Below, etc. You just sit there and shoot.
Akil'zon is more interesting because of the execution elements. If you're lucky, you get assigned to DPS Akil'zon, in which case it's a standard boss fight aside from dealing with the storm. If you're unlucky, like me, you get assigned to anti-eagle duty once they spawn. For me, this tends to be a lot of tab-targeting and praying that Fireball actually works. [Read more about @title]