Prepare one durable first target for Hydra's opening pressure, then let protected boss-damage heroes finish the fight.
This is the exact shipped Demo 0.5.5 boss formation, carried forward after the 0.5.6 through 0.5.11 notes announced no formation change: authored cell 3,4 maps to the center of the enemy front row at r0c3.
Kai represents the durable first target. Karsu and Irini represent the lower-rank scaling boss damage that Aesah recommends keeping available.
The encounter set is current to Demo 0.5.11. The strategic interpretation remains tied to Demo 0.5.2; it should be tested again whenever targeting or enemy behavior changes.
Enemy identity and listed abilities are reviewed through Demo 0.5.11. No unverified damage or timing values are added here.
The shipped Demo 0.5.5 stage data places this boss at authored cell 3,4 (front-row center), mapped here to enemy slot r0c3. Patches 0.5.6 through 0.5.11 did not announce a formation change.
Positioning and team-role notes are adapted from Aesah's Demo 0.5.2 Red Rift guide. They are starting points, not claims that one fixed formation solves every roll.