So with the fix from Sunfire on 4.3 PTR, I threw up 5 million damage to a training dummy just to see how our damage breaks down.
Primary nukes (Wrath, Starfire): 50%
DoTs (Sunfire, Insect Swarm, Moonfire): 30%
Together, Moonfire & Sunfire did an impressive 18% damage, where insect swarm was roughly 12%.
Again, we will want to always cast insect swarm before sunfire/moonfire, as they do more damage per tick, and we want Sunfire/Moonfire to receive the extra haste from Nature’s Grace. (At my haste level [40%], insect swarm will tick 13 times and moonfire/sunfire tick 15 times, per cast.)