How to Get the Esper Zalera in 'FFXII'

Focus on the Dead Bones conjured by Zalera when the battle first begins. Most attacks will not hurt the Esper until you defeat the Dead Bones. Use Dispel on Zalera to eliminate any status enhancements and then attack the Dead Bones.

Defeat a second set of Dead Bones after vanquishing the first two that were conjured by Zalera. Once you beat all four, the battle against Zalera begins.

Use weaker offensive characters in your party to heal or revive the stronger members, as Zalera's attacks, particularly the Prime Level Death maneuver, can quickly decimate your team. Use your strongest offensive attacks to weaken Zalera.

Back away from Zalera after it unleashes its first Prime Level Death attack. This will prevent Zalera from raising two more Dead Bones until you have time to heal your party.

Defeat the next second of Dead Bones and attack Zalera again. The Esper should be getting low on health at this point. Try a Quickening maneuver to finish Zalera off before it uses a second Prime Level Death attack. Be prepared to heal and revive your party again, otherwise.