Have one or both DPS from Nezir swapping to Rohash before Storm Shield to nuke it down, then head right back to Nezir/Anshal as needed. Storm Shield is generally the failure point on Council and there's no shame in sending extra force over just to deal with that for a few seconds.
We began the encounter with the prot and holy paladin, Mage, and Hunter on Nezir's platform, with the healer and tank bubbling off the debuff. Prot warrior and other holy paladin on Anshal's platform (Mage and hunter switched over when adds spawned) along with the frost DK for kiting. The Rogue and Druid were on Rohash's platform along with the disc priest. We ran into problems with on the wind platform as the melee dps were unable to consistently get down the shield in time/additional deaths from wind shear...The adds on Anshals platform are dying before the ultimate, but we can't seem to sync our platforms success.