If you have Shield Oath up (hey I've seen it happen, and done it myself) and are using pre-combo'd Savage Blade or Rage of Halone, the only thing I can think of is that the DPS are getting a bit trigger happy when Chirada spawns. As mentioned above, to make sure you grab her, pre-load your Rage of Halone so that you hit Chirada with it when she spawns. For the first appearance, pull her south as far as you can, and when she's dead, go and Provoke Suprana off of the Main Tank and pull her off to one side to ease damage (but be careful not to line-of-sight your Healers behind the rocks). If DPS is good, you sometimes don't need to do that part, but even my i105 Monk dies from double Wicked Wheel sometimes, so it makes it easier for melee as well.
In the next phase in the eye of the storm, Provoke > Shield Lob and then Flash the Spiny Plume as soon as the Plumes spawn. Flash a couple of times to hold it, and move it away from the Razor Plumes to allow the DPS to AOE as many of the others as they can. Once the Razor Plumes are down, go and help DPS Garuda until she jumps. The Main Tank should Provoke the Spiny off of you once you hit two stacks.
Next phase, same again, pre-charge Rage of Halone by hitting Garuda with Fast Blade > Savage Blade and hit Chirada with it as soon as she spawns. Provoke the Spiny Plume as soon as it spawns as well and make sure to hit it with a Shield Lob to secure it. Pull her and the Spiny south-east on the mini-map for when the whirlwinds start, and the DPS should focus down Chirada. Throw a couple of Flashes in now and again to ensure the Spiny stays on you. When Chirada is dead, you will probably have hit two stacks with the Spiny, so the Main Tank should Provoke it off of you, at the same time as you Provoking Suprana to your position so that the melees can avoid double Wicked Wheel. Not all groups do this, but if the melee DPS you have in your group are particularly low item level, it's normally best to do this as they will almost certainly die (especially if they have Blood for Blood up like I did yesterday.... XD).
Then it's rinse and repeat until dead![]()