Create a Solo Custom Game with these settings.
Map: Aviary
Mode: Arena
Map Effect: Fair Weather
Difficulty: Favours Hunters
Wildlife: Low
Strikes: Infinite
Battle Wins: 1
Battle Duration: Infinite
Monster Armour: 0%
Monster Stage: 1
Then just simply kill the monster and win the round, with the above settings it should be really easy and only take a minute.