For Garuda Extreme on the Satin phase, I refresh DoTs on Garuda, Bane to spread to nearby plumes... and then Blizzard II any groups of plumes. Of course, if no one else is focusing the Satin plume, you will want to be focusing on that. Nothing is more annoying than getting slept. The reason I prefer Blizzard II is because it is a faster cast and more damage than Tri-Disaster. The added bind effect from Tri-Disaster does not help here, as they will stop moving where they want to anyway. Unfortunately, you will need to be 'near' the plumes to use Blizzard II. In vortex phase, I refresh DoTs on Garuda, Contagion if it's up, and then wait for Plumes to gather and use Blizzard II to kill them. I won't spread DoTs in this phase JUST in case the Spiny decides to behave oddly. If you do accidentally spread DoTs to the Spiny, you will cause your party to wipe.