Well, my dps is pretty far from insane tbh, given the same level of gear your group setup should actually yield a better dps. Also, my gear isn't really anything special (half blues, half purples), although they're enchanted to the teeth :-) My castsequence is simply a /castrandom lightning bolt, chain lightning, chain lightning, chain lightning on my shammies and for the druid I have a trash mob macro (/castsequence wrath, starfire) and a boss macro (where I time in insect swarm and moonfire) - i rarely even bother with fairy fire although I guess I should for efficiency :-)

What I do is simply pop a heroism + trinkets at the beginning and go to town. Note that it's pretty random when she starts whirling people around, sometimes she'll do it at 60-70% to me as well.In that case I do one of the following: a) if the positioning is right (how she drops you is random) I chain heal, back off and restart DPS b) if the positioning is screwed up, I hit my follow button immediately followed by a movement command so that they face my tank, then I hit the back up button moving out of immediate AE range and chain heal (whatever group heal should work fine) and back to DPS.