Originally Posted by
Lavitz_
Your DPS before the split is most important, so of course you want to squeeze out anything you can. As Aikaal said, spreading Thundercloud procs to both bosses is a nice DPS boost and it just starts raining procs which also help with movement, so you want to be doing that as much as you can. When the first two adds spawn, don't cast more than one Fire IV on them as you'll be wasting DPS if your other party members are also attacking them, I'm seeing 9k-10k crits on those sometimes.
I'm still trying to figure out the best way to handle adds, it can be frustrating at times. The rest of the fight is pretty straightforward.