Stay right on top of the last boss, when she does her expanding aoe circle quickly move out then immediately dodge back in close to her, if any group member is too far away she will nuke them with a nasty ranged attack, which is dodgable but easier to avoid of not triggered.
Insightful from this one, Xynode add to your guide for dungeon.NordSwordnBoard wrote: »Immovability pots for rezz works in the winds