How to Complete A Lanista's Pride
The objective is to protect the Lanista and defeat all foes. Lightning attacks (including attacks with Lightning-elemental weapons) are forbidden.
The Head Editor and Owner are weak, so ignore them until you have gotten rid of the Assassin, Ninja, and Parivir. Start with the Assassin, since she is wielding a bow and can easily hit the Lanista, then go after the Ninja, who is using Dual Wield, allowing him to do a lot of damage at once.
Completing this quest unlocks the Lanista job for Seeq units.