Don't spend hours to kill phoenix pet, This is how you one shot, Head to this location on the map, Now use charged shot skill and equip explosive arrow, now shoot it with charged shot in focus mode. Go ahead and skin it. Now you got the legendary phoenix pet, Now go to any witch use special items menu and now craft it, after phoenix is registered as new pet now you can now travel with phoenix as a pet it will collect loot faster than other pets.