Why you would want an Adarza

The Adarza is an Eidolon cat. It is used for any content where anyone in your party wants "high crit", such as in Eidolon fights. Anywhere where people are close together, like farming materials in a small room or all together around an Eidolon, the Adarza's crit buff is incredibly useful.

Survivability
Link Health
Refect

Damage
[Hunter Synergy]
[Sharpened Claws]
[Maul]

Critical Chance
[Bite]
[Cat's Eye]
[Hunter Synergy]

With these mods the Kavat easily gets to over 100% crit.

Utility
[Tek Enhance], keeps up the [Cat's Eye] buff for longer.
[Fetch]
[Primed Animal Instinct]

Other mods
Feel free to change out [Sharpened Claws] or [Primed Animal Instinct], for [Primed Pack Leader] (or [Pack Leader]) if your pet is dying a lot depending on your content.
[Primed Animal Instinct] if your not looting anything too far away, and [Sharpened Claws] if you are doing normal missions.